Reference:bubbleback: Difference between revisions

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{{#seo:

|title=Rolex bubbleback — Production, Dial Variants, Serial Ranges | Rolexopedia

|description=~~Every~~ Rolex ~~Bubbleback reference from the 1933 original through the mid-1950s transitional era. Production histories, movement progression~~, ~~dial variants~~, and ~~collector context~~.

|description=Early Rolex Oyster Perpetual references with domed casebacks, documented examples, and catalogue dates into the late 1950s.

|keywords=Rolex Bubbleback, Ovetto, Ovettone, Padellone, Oyster Perpetual, Monoblocco, Submarine Hermetique, 1858, 3131, 3372, 4467, 3666, 6098, 8171, 3525, 3003, 6105, Datejust, Precision, Cal. 520, Cal. 620, Cal. 630, Cal. 1030, vintage Rolex, collector guide

|image=Bubbleback_vintage_poster.webp

|image_alt=Vintage Rolex Bubbleback ~~— the~~ Oyster Perpetual ~~with the domed caseback, produced 1933 through the mid-1950s~~

|image_alt=Vintage Rolex Bubbleback advertisement with an Oyster Perpetual watch

|type=Article

|og_type=article

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</div>

The Bubbleback is Rolex's early Oyster Perpetual family. The automatic rotor ~~was too thick for~~ a ~~flat~~ case, so Rolex domed the ~~caseback~~ over the ~~movement and created the profile collectors now call Bubbleback~~. ~~Production examples run from 1933 into the mid-1950s; later Cal. 1030~~ references could use a flatter ~~caseback~~, so the ~~line gradually moved away from~~ the ~~domed profile~~. Italian collectors call the standard 32mm case Ovetto and the 36mm cases Ovettone.

The Bubbleback is Rolex's early Oyster Perpetual family. The automatic rotor needed a deeper case than a hand-wound movement, so Rolex domed the back over the mechanism. Later references with thinner movements could use flatter backs. Auction catalogues date some large no-date examples, including ref. 5026, into the late 1950s; those estimates do not set an endpoint for the whole family. Italian collectors call the standard 32mm case Ovetto and the 36mm cases Ovettone.

== Common entry points ==

<div class="rp-card"><div class="rp-card-body"><div class="rp-card-meta">Identifying a first-generation Bubbleback?</div><div class="rp-card-title">[[Reference:1858|1858]]</div><div class="rp-card-text">The first Bubbleback. ~~Cal~~ 520 ~~with the full 360-degree rotor~~, ~~the Didactic engravings in French on the movement plate~~, and the ~~four-piece case form~~.</div></div></div>

<div class="rp-card"><div class="rp-card-body"><div class="rp-card-meta">Identifying a first-generation Bubbleback?</div><div class="rp-card-title">[[Reference:1858|1858]]</div><div class="rp-card-text">The Field Manual identifies ref. 1858 as the first Bubbleback and lists Cal. 520. Catalogued watches carry dates of 1933, circa 1935, and the 1930s.</div></div></div>

<div class="rp-card"><div class="rp-card-body"><div class="rp-card-meta">Cross-checking a two-piece case Bubbleback?</div><div class="rp-card-title">[[Reference:3131|3131]]</div><div class="rp-card-text">First two-piece case Bubbleback. The 1936 case simplification, precious-metal only (9K, 14K, 18K yellow and pink gold), Cal 620 with sub-seconds.</div></div></div>

<div class="rp-card"><div class="rp-card-body"><div class="rp-card-meta">Working from a Luxury Model dial photo?</div><div class="rp-card-title">[[Reference:3372|3372]]</div><div class="rp-card-text">The "Luxury Model" name appears in period advertising; documented examples and manual entries show several bezel and seconds configurations.</div></div></div>

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|-

| [[Reference:3139|3139]] || c.1940–1942 || 10½′′′ Hunter, manual || 32mm cushion Oyster, 3-piece || Only Rolex with "Army" on the dial; cushion case in the Borgel-derived 1920s family; documented British military and civilian examples

|-

| [[Reference:3351|3351]] || Auction dates circa 1935 and 1940s; Dawsons estimates circa 1942; a collector post dates a pictured Seaforth circa 1942; run unknown ([https://jewelry.ha.com/c/item.zx?ic16=ViewItem-Auction-Archive-JumpLot-PreviousLot-050318&lotNo=56280&saleNo=5242 Heritage]; [https://www.christies.com.cn/en/lot/lot-4785368 Christie's]; [https://dawsons.blob.core.windows.net/main/Full%20Catalogue%20-%20May%202022%20Jewellery.pdf Dawsons]; [https://www.reddit.com/r/rolex/comments/fj0jvy Reddit]) || Cal. 59 reported on Standard/Regent/Lincoln examples; separate Extra Prima ([https://www.darlor-watch.com/rolex_watches_3.html Darlor 3351-F]; [https://www.christies.com/lot/lot-3057585 Christie's]) || 28–29mm; circular hooded-lug or cushion; steel, gilt/gold-filled and two-tone cases || Standard, Regent, Lincoln and Extra Precision labels; Seaforth/Observatory dial. Dealer archives write 3351-F/3351f; suffix meaning unresolved ([https://www.darlor-watch.com/rolex_watches_3.html Darlor]; [https://www.vintagewatch.ca/5629-antique-rolex-oyster-cushion-case-with-sweep-seconds-circa-1930/ Trebor])

|-

| [[Reference:3359|3359]] || c.1939–1947 || 10½′′′ Hunter, manual || 32mm tonneau Oyster, two-tone SS + pink gold || ''Viceroy''-signed dial; two-tone SS case with pink gold bezel; applied luminous numerals

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== First Bubbleback ~~(1933–1935)~~ ==

== First Bubbleback ==

The first ~~production Perpetual~~. Cal. 520 ~~(Hunter 8¾′′′)~~ with a ~~full 360~~-~~degree rotor~~. ~~Early examples carry the Didactic engravings: step~~-~~by-step service~~ instructions ~~in French cut directly into the movement plate~~.

The Vintage Rolex Field Manual identifies ref. 1858 as the first Bubbleback and lists Cal. 520. Vintage & Prestige also lists Cal. 520 for stock W2107; Hodinkee's 2024 family guide assigns Cal. 620 to the first series beginning with ref. 1858. Antiquorum dates one example to 1933 and another to circa 1935; Phillips dates case 52,736 to circa 1935, while Antiquorum Hong Kong gives circa 1930s. WatchNet Japan lists a stainless-steel example, product A-6378, at 30.5 mm with a four-part case. Antiquorum, Aste Bolaffi, and WatchNet describe engraved watchmaker instructions on individual watches.

{| class="wikitable" style="width:100%;"

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! Reference !! Production !! Movement !! Case !! Key distinction

|-

| [[Reference:1858|1858]] || ~~1933–1935~~ || Cal. 520~~, 17j~~ || ~~32mm tonneau, 3/4~~-~~piece~~ || First Bubbleback; ~~Didactic movement; 60% Didactic split across 5 confirmed auction lots~~

| [[Reference:1858|1858]] || Catalogued examples dated 1933, circa 1935, and 1930s || Field Manual and dealer listings attribute Cal. 520; Hodinkee assigns Cal. 620 to the first series; catalogues report 8¾ or 9¾ line and 17 or 19 jewels || 30.5–32 mm in individual listings; three-body and four-part cases || First Bubbleback per the Field Manual; instructions engraved on several catalogued movements

|}

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|-

| [[Reference:4467|4467]] || 1945–1949 || Cal. A.295 (= 740/745), 18j || 36mm 18K YG/PG tonneau, 2-piece || Early Datejust; early Jubilee and solid end-link configuration; ''Ovettone''; date wheel evolves all-black → all-red → roulette

|-

| [[Reference:4984|4984]] || Christie's/HENRY's c.1940s–c.1945 (likely same watch); About Time estimates c.1947; span unknown || Automatic; caliber not identified; movement nos. N15927 (likely repeat sale) and N880639 || ~32mm; pink- and yellow-gold examples || Two photographed watches; individual two-tone and silver dial descriptions; no factory variant range established

|-

| [[Reference:5030|5030]] || circa 1948 || Cal. A.295 / 740 (see reference-specific sources) || 36mm; solid gold examples || Early date-equipped Oyster Perpetual; paired with the 5031 in some collector usage

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|-

| [[Reference:6074|6074]] || Platinum commission dated 1950; gold attributions circa 1950s unresolved || Cal. 630 NA on one gold watch with reworked caseback; 9¾-ligne/17j on platinum lot; no reference-wide assignment || 34–36mm in separate catalogues || Platinum example has smooth bezel; gold examples need attribution checks

|-

| [[Reference:6075|6075]] || Auction dates include 1950–51; one c.1961 estimate conflicts || A.295 and A.296 attributed in separate catalogues || 35–36mm; 18K YG/PG and steel + YG; one 10K YG catalogue description || Gold, pink-gold and two-tone cases; one photographed Datejust dial is graded restored

|-

| [[Reference:6105|6105]] || Early 1950s; catalogue dates vary || A.296 and 745-attributed examples || 36mm; gold and two-tone examples || Early dial-signed Datejust; often credited as first, but factory first use is not settled by the 6075 restored dial

|}

== Large no-date Oyster Perpetual: ref. 5026 ==

Ref. 5026 is documented in 36 mm steel automatic examples with subsidiary seconds. Auction catalogues date individual watches from circa 1946 to circa 1958, but those estimates do not define the reference's production span. Aste Bolaffi assigns automatic Cal. 720/18 jewels to case 443371; other catalogues do not name a caliber. [[Reference:5026|The reference article]] records the case, dial, movement, and bracelet evidence. [https://onlineonly.christies.com/s/christies-watches-online-time-travel/rolex-steel-bubble-back-enamel-dial-ref-5026-123/71687 Christie's, lot 123] [https://www.astebolaffi.it/en/lot/257/4/detail Aste Bolaffi, lot 4] [https://catalog.antiquorum.swiss/en/lots/rolex-ref-5026-lot-297-239 Antiquorum, lot 239]

== Large no-date Oyster Perpetual: ref. 5028 ==

Ref. 5028 is a large, no-date automatic Oyster Perpetual catalogued in steel and 18K gold, usually grouped with the Ovettone Bubblebacks. Case measurements in sale records are 35–36 mm. Monaco Legend dates case 412191 to 1945; Christie's gives circa 1946 for that same case and dates case 493076 to 1946. Other dated examples include Monaco Legend case 411813 (1958) and an unnumbered Antiquorum watch dated to the 1960s. These catalogue dates do not establish a production span. Records show centre-seconds and dual-seconds dials; movement descriptions vary between 10½ and 11 lignes and do not settle a single caliber. See [[Reference:5028|the case and dial record for ref. 5028]]. [https://www.monacolegendauctions.com/auction/exclusive-timepieces-32/lot-47 Monaco Legend, 2023, lot 47] [https://www.christies.com/lot/lot-6590236 Christie's, New York 2026, lot 98] [https://www.christies.com/en/lot/lot-4795731 Christie's, Geneva 2006, lot 32] [https://www.monacolegendauctions.com/auction/exclusive-timepieces-22/lot-126 Monaco Legend, 2020, lot 126] [https://catalog.antiquorum.swiss/en/lots/rolex-lot-26-360 Antiquorum, 2002, lot 360]

== Large no-date Oyster Perpetual: ref. 5029 ==

Auction catalogues document separate 5029 examples dated circa 1947 and 1949, in two-tone steel and gold, yellow gold, and pink gold. The 35–36 mm cases carry different dial and bezel layouts. Catalogued movement descriptions vary between A.295, “Super Balance 730,” and 9¾-line, 18-jewel movements; each remains tied to its own example. [[Reference:5029|The reference article]] records the case-numbered evidence and disputed listings. [https://shop.hodinkee.com/products/1947-rolex-ref-5029-two-tone-oyster-perpetual-big-bubble Hodinkee, case 610727] [https://www.phillips.com/detail/rolex/87265 Phillips, lot 144] [https://catalog.antiquorum.swiss/en/lots/rolex-lot-262-295 Antiquorum, lot 295]

== Late small Bubbleback examples ==

Auction catalogues date individual ref. 5002 watches from circa 1945 to circa 1952, and ref. 5006 examples from 1948 into the 1950s. Dealer and auction listings also identify ref. 5045 examples around 1949–50; the Loupe This lot includes a photograph of the inner caseback stamp. The 5002 records describe 23–26 mm steel, two-tone, and gold cases; 5006 records give 29–30 mm steel and gold examples. For 5013, Doyle and Linckersdorff list solid-gold watches; Curious Curio, Cool Auction, and GMTBroker describe steel cases with gold bezels. The examined listings show several dial layouts, but do not establish their order or factory originality. Cool Auction assigns Cal. 630 / 630NA to its individual watch. A Rolex Forums chart gives 9.75 lignes, a size notation rather than a caliber. One marketplace listing describes a centre-seconds chapter-ring 5013, but its photograph shows no reference stamp or caseback, so that attribution is unverified. These dates and configurations belong to individual records, not production endpoints. Christie’s describes its circa-1940 ref. 6006 as a Bubble Back. Later Christie’s and Antiquorum catalogues document gold examples dated 1952–55, with both central and subsidiary seconds. The 1952 Antiquorum watch is case 927300, with Cal. 520 and a restored subsidiary-seconds dial. These lot dates do not establish production boundaries. See [[Reference:6006|the 6006 record]]. [https://www.christies.com/en/lot/lot-1588049 Christie’s, circa-1940 ref. 6006] [https://catalog.antiquorum.swiss/en/lots/rolex-lot-108-253 Antiquorum, case 927300] [https://www.christies.com/lot/lot-4700386 Christie’s, 1953 ref. 6006] [https://www.christies.com/en/lot/lot-4006241 Christie’s, circa-1955 ref. 6006] [https://catalog.antiquorum.swiss/en/lots/rolex-ref-5006-lot-272-142 Antiquorum, case 671819] [https://www.ebth.com/items/14105766-1948-rolex-oyster-perpetual-bubble-back-watch EBTH, item 14105766] [https://timeanagram.com/products/7593 TimeAnagram, product 7593] [https://www.arsvalue.com/en/lots/1423503/rolex-ovetto-5006-anni-50?nav=True Finarte, lot 33] [https://irp-cdn.multiscreensite.com/0b5fdf83/files/uploaded/1.0%20RolexBook-23Mar.pdf Vintage Rolex Field Manual, p. 107] [https://www.doyle.com/auction/lot/lot-1088---rolex-gold-oyster-perpetual-bubbleback-wristwatch-ref-5013/?lot=1446668&sd=1 Doyle, lot 1088] [https://www.ebay.de/itm/355515195857 Linckersdorff Berlin, item 355515195857] [https://curious-curio.jp/watch/52035 Curious Curio, stock CW-G346] [https://www.cool-auction.net/gallery/20125/ Cool Auction, stock 20125] [https://www.gmtbroker.com/gallery/Anonimo/ROLEX---BubbleBack-5013-ovetto-silver-dial-1948-photo852821.html GMTBroker, 5013 listing] [https://www.rolexforums.com/attachment.php?attachmentid=82672&d=1250802852 Rolex Forums model-to-caliber chart, 5013 row]

{| class="wikitable" style="width:100%;"

|-

! Reference !! Production evidence !! Movement !! Case evidence !! Key distinction

|-

| [[Reference:5002|5002]] || Catalogue dates circa 1945–1952; run unverified || Automatic; Cal. 420 assignment uncertain because its catalogue describes centre-seconds, while 5002 lots describe subsidiary seconds || 23–26 mm in cited lots; steel, steel/pink gold, yellow gold, pink gold, and rose gold || Ladies’ Oyster Perpetual with subsidiary seconds; Field Manual lists /7 and /8 suffix descriptions, not tied to observed lots

|-

| [[Reference:5003|5003]] || Individual catalogue estimates circa 1949–1953; later 1960s estimates and a weak circa-1972 transcription conflict; run unverified || Automatic, subsidiary seconds; numeric caliber unidentified || 23–27 mm; steel, steel/gold, 10K and 18K gold examples || Ladies’ Oyster Perpetual; Field Manual lists /3, /7, /8 variants, not matched to auction examples

|-

| [[Reference:5006|5006]] || Individual records dated 1948 through the 1950s; run unverified || Automatic; Field Manual lists Chronometer Perpetual variants; numeric caliber unresolved || 29–30 mm; steel, steel with yellow- or rose-gold bezel, and gold listed || Mid-size suffix variants 5006/3 and 5006/7 in the Field Manual; auction dial descriptions differ

|-

| [[Reference:5010|5010]] || Catalogue examples circa 1945–1955; production span unverified || Automatic, centre seconds; 9¾-ligne size in catalogues, numbered caliber unresolved || Steel and two-tone; 31–33 mm in cited records || Oyster Perpetual grouped with Bubblebacks by collectors; Phillips records a 1950 Anno Sancto bezel. [https://www.christies.com/lot/lot-856369 Christie's] [https://catalog.antiquorum.swiss/en/lots/rolex-ref-5010-bubbleback-lot-313-136 Antiquorum] [https://www.phillips.com/detail/rolex/CH080515/282 Phillips] [https://electronicsandbooks.com/edt/manual/Art/Auction/Bonhams/2022/20220524%20S-27810-0-1%20Montres%20de%20Prestige.pdf Bonhams, lot 276]

|-

| [[Reference:5013|5013]] || Individual listings date examples to the 1940s; production span unknown || Automatic, subsidiary seconds; one seller assigns Cal. 630 / 630NA; reference-wide caliber unresolved || Approx. 32 mm; solid-gold and steel/gold examples listed || Cream Arabic-and-baton, Roman, wedge-marker, and silver Arabic dials appear in separate records; sequence and originality are not established

|-

| [[Reference:5045|5045]] || Individual examples dated circa 1949–50; production span unverified || Automatic; chart and dealer give different 9¾-line NA and 10½-line NA movement-size/family designations; no caliber established || 31–32 mm; steel and rose-gold or bi-color listings || Inner caseback stamp photographed on one example; silver 12-3-6-9 and wedge-marker dials appear in listings; one listing describes luminous markers around a circular minute track. [https://loupethis.com/auctions/rolex-bubbleback-5045-two-tone-pink-gold-and-steel Loupe This] [https://cticorp.jp/?p=44936 Watch CTI] [https://timeanagram.com/products/12221 TIMEANAGRAM]

|-

| [[Reference:5018|5018]] || Auction catalogues date examples from 1948 into the 1950s; one case receives conflicting 1949 and circa-1959 dates || Automatic, centre seconds; catalogues report 9¾-line and 17/19 jewels; numbered caliber unresolved || 32–34 mm in cited lots; steel, 18K gold, and steel/yellow-gold || Auction titles use Bombé and Bombay; catalogues show varied dial layouts. Production span remains unknown. [https://catalog.antiquorum.swiss/en/lots/rolex-lot-108-23 Antiquorum, case 608519] [https://www.christies.com/en/lot/lot-5367913 Christie’s, case 678865] [https://catalog.antiquorum.swiss/en/lots/rolex-ref-5018-oyster-perpetual-lot-344-297 Antiquorum, case 608632] [https://www.finarte.it/auction/fine-watches-milan-2025-06-09/rolex-oyster-perpetual-5018-137264?lang=en Finarte, case 670691]

|}

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|-

| [[Reference:8171|8171]] || c.1949–1953 || Cal. A.295 CPL automatic triple calendar moonphase, in-house Aegler || 38mm non-Oyster snap caseback, 18K YG/PG, SS rare || Triple calendar + moonphase; ''Padellone''; published examples include stainless steel and gold cases

|}

== Ref. 4392 ==

Auction catalogues identify ref. 4392 as an Oyster Perpetual and date individual examples from circa 1945 through one circa-1959 estimate. The records describe 31–32 mm steel and gold cases and identify Cal. 630 / 630NA in several watches. Antiquorum's case 607544 pairs a Cal. 630 catalogue attribution with a small-seconds dial it considers probably reprinted; its photos do not show the movement. [[Reference:4392|The reference article]] keeps these details tied to their individual catalogue records. [https://jewelry.ha.com/c/catalog-print.zx?ic5=CatalogHome-AucType-PrintableCatalog-071515&saleNo=5097 Heritage, lot 60319] [https://catalog.antiquorum.swiss/en/lots/rolex-ref-4392-bubble-back-stainless-steel-lot-383-105 Antiquorum, lot 105]

== Ref. 4919 ==

Auction catalogues identify ref. 4919 as an Oyster Perpetual and date individual examples from circa 1947 to the 1950s; Farsettiarte dates a caseback-marked example circa 1960. A secondary copy of an Antiquorum catalogue assigns one example to the 1930s, in conflict with those later dates; see [[Reference:4919|the 4919 article]] for the source and limits. None sets a production span. Auction descriptions and an undated technical table give an automatic 9¾-line movement, but no numeric caliber is confirmed. Collectors group 4919 with Bubblebacks. [https://catalog.antiquorum.swiss/en/lots/rolex-lot-221-365 Antiquorum, case 608098] [https://www.christies.com/en/lot/lot-1720329 Christie's] [https://www.farsettiarte.it/uploads/auctions/187-asta_257_Orologi_5_dicembre_2024.pdf Farsettiarte, lot 50] [https://www.vrfm.io/Scans/OYSTER-CROWNS-GUIDE.pdf Rolex Boîtes Oyster table]

{| class="wikitable" style="width:100%;"

|-

! Reference !! Catalogue dates !! Movement !! Case evidence !! Distinction

|-

| [[Reference:4919|4919]] || One copied catalogue gives a 1930s outlier; others date examples circa 1947–1960; production span unknown || Automatic, 9¾-line in catalogues; numeric caliber unresolved || Steel with yellow- or pink-gold bezels; 31–34 mm in cited examples || Separate dial layouts include a Serpico y Laino-signed example; Tennants reports one caseback marked 4919 5011, unexplained

|}

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* [https://catalog.antiquorum.swiss/en/lots/rolex-lot-108-229 Antiquorum, "Mondani Collection, lot 229 — ref. 1858 Didactic, Bucherer-signed, 1933", Antiquorum, 2006]

* [https://www.astebolaffi.it/en/lot/261/34/detail Aste Bolaffi, "Torino, lot 34 — Rolex Ovetto ref. 1858 Didactic", Aste Bolaffi, 2020]

* [https://catalog.antiquorum.swiss/en/lots/rolex-lot-272-233 Antiquorum, Geneva, lot 233 — ref. 1858 case 48191, circa 1935]

* [https://catalog.antiquorum.swiss/en/lots/rolex-ref-1858-bubble-back-gilt-dial-lot-345-47 Antiquorum, Hong Kong, lot 47 — ref. 1858 case 48449, circa 1930s]

* [https://www.vintageandprestige.com/product/rolex-oyster-perpetual-bubbleback-1858/ Vintage & Prestige, stock W2107 — dealer-described 9K example]

* [https://www.watchnet.co.jp/en/item/view/5300 WatchNet Japan, product A-6378 — ref. 1858, Cal. 520, four-part case, 30.5 mm]

* [https://www.hodinkee.com/articles/the-rolex-bubbleback-and-why-it-still-matters Anthony Traina, Hodinkee, “The Rolex Bubbleback and Why It Still Matters”, 7 October 2024]

* [https://catalog.antiquorum.swiss/en/lots/rolex-lot-83-146 Antiquorum, "Geneva, lot 146 — ref. 2136, steel cushion Oyster, c.1925", Antiquorum, 1999]

* [https://www.sothebys.com/en/buy/auction/2020/watches-online/rolex-ref-3372-bubbleback-retailed-by-serpico-y Sotheby's, "Watches Online, lot 71 — ref. 3372, salmon dial, retailed by Serpico y Laino, c.1945", Sotheby's, 2020]

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* [https://www.phillips.com/detail/rolex/CH080515/284 Phillips 2015, ref. 6075 A.296]

* [https://www.cambiaste.com/uploads/auctions/807-cambi_orologi_719_2022_05_eb.pdf Cambi Aste 2022, ref. 6075 steel and gold]

* [https://jewelry.ha.com/c/item.zx?ic16=ViewItem-Auction-Archive-JumpLot-PreviousLot-050318&lotNo=56280&saleNo=5242 Heritage Auctions, ref. 3351 Regent, case 118141, circa 1935]

* [https://www.christies.com.cn/en/lot/lot-4785368 Christie's, ref. 3351 Standard, case 118412, circa 1940s]

* [https://www.christies.com/lot/lot-3057585 Christie's, ref. 3351 Extra Precision, case 118404]

* [https://dawsons.blob.core.windows.net/main/Full%20Catalogue%20-%20May%202022%20Jewellery.pdf Dawsons, ref. 3351 Lincoln, serial 170648, circa 1942]

* [https://antiwatchman.com/products/detail.php?product_id=14533 AntiWatchman, ref. 3351 Regent and movement photograph]

* [https://www.ebay.com/itm/227412128120 eBay seller watchnj, photographed ref. 3351 Seaforth / Observatory]

* [https://wannabuyawatch.com/product/rolex-oyster-standard-ref-3351-boys-size-circa-1941/ Wanna Buy A Watch, ref. 3351 Standard]

* [https://www.reddit.com/r/rolex/comments/fj0jvy Reddit r/rolex collector post, Seaforth ref. 3351, circa 1942 attribution]

* [https://www.darlor-watch.com/rolex_watches_3.html Darlor Vintage Watches, ref. 3351-F, serial 118,489]

* [https://www.vintagewatch.ca/5629-antique-rolex-oyster-cushion-case-with-sweep-seconds-circa-1930/ Trebor's Vintage Watches, ref. 3351f]

* [https://electronicsandbooks.com/edt/manual/Art/Auction/Bonhams/2022/20220524%20S-27810-0-1%20Montres%20de%20Prestige.pdf Bonhams Paris, 24 May 2022, ref. 5010, lot 276]

* [https://www.doyle.com/auction/lot/lot-1088---rolex-gold-oyster-perpetual-bubbleback-wristwatch-ref-5013/?lot=1446668&sd=1 Doyle, ref. 5013, lot 1088]

* [https://www.ebay.de/itm/355515195857 Linckersdorff Berlin, ref. 5013, item 355515195857]

* [https://curious-curio.jp/watch/52035 Curious Curio, ref. 5013, stock CW-G346]

* [https://www.cool-auction.net/gallery/20125/ Cool Auction, ref. 5013, stock 20125]

* [https://www.gmtbroker.com/gallery/Anonimo/ROLEX---BubbleBack-5013-ovetto-silver-dial-1948-photo852821.html GMTBroker, ref. 5013]

* [https://www.rolexforums.com/attachment.php?attachmentid=82672&d=1250802852 Rolex Forums, model-to-caliber chart, ref. 5013 row]

* [https://www.vetroplastica.it/referenze.html VetroPlastica, reference index, ref. 5013]

* [https://marketplace.watchcharts.com/listing/5477111-fs-rolex-5013-oyster-perpetual-chapter-ring-dial Marketplace listing, centre-seconds chapter-ring description; reference attribution unverified]

[[Category:Reference family]]

[[Category:Bubbleback]]

@@ Line 2: / Line 2: @@
 {{#seo:
 |title=Rolex bubbleback — Production, Dial Variants, Serial Ranges &#124; Rolexopedia
-|description=Every Rolex Bubbleback reference from the 1933 original through the mid-1950s transitional era. Production histories, movement progression, dial variants, and collector context.
+|description=Early Rolex Oyster Perpetual references with domed casebacks, documented examples, and catalogue dates into the late 1950s.
 |keywords=Rolex Bubbleback, Ovetto, Ovettone, Padellone, Oyster Perpetual, Monoblocco, Submarine Hermetique, 1858, 3131, 3372, 4467, 3666, 6098, 8171, 3525, 3003, 6105, Datejust, Precision, Cal. 520, Cal. 620, Cal. 630, Cal. 1030, vintage Rolex, collector guide
 |image=Bubbleback_vintage_poster.webp
-|image_alt=Vintage Rolex Bubbleback — the Oyster Perpetual with the domed caseback, produced 1933 through the mid-1950s
+|image_alt=Vintage Rolex Bubbleback advertisement with an Oyster Perpetual watch
 |type=Article
 |og_type=article
@@ Line 19: / Line 19: @@
 </div>
-The Bubbleback is Rolex's early Oyster Perpetual family. The automatic rotor was too thick for a flat case, so Rolex domed the caseback over the movement and created the profile collectors now call Bubbleback. Production examples run from 1933 into the mid-1950s; later Cal. 1030 references could use a flatter caseback, so the line gradually moved away from the domed profile. Italian collectors call the standard 32mm case Ovetto and the 36mm cases Ovettone.
+The Bubbleback is Rolex's early Oyster Perpetual family. The automatic rotor needed a deeper case than a hand-wound movement, so Rolex domed the back over the mechanism. Later references with thinner movements could use flatter backs. Auction catalogues date some large no-date examples, including ref. 5026, into the late 1950s; those estimates do not set an endpoint for the whole family. Italian collectors call the standard 32mm case Ovetto and the 36mm cases Ovettone.
 == Common entry points ==
 <div class="rp-grid">
-<div class="rp-card"><div class="rp-card-body"><div class="rp-card-meta">Identifying a first-generation Bubbleback?</div><div class="rp-card-title">[[Reference:1858|1858]]</div><div class="rp-card-text">The first Bubbleback. Cal 520 with the full 360-degree rotor, the Didactic engravings in French on the movement plate, and the four-piece case form.</div></div></div>
+<div class="rp-card"><div class="rp-card-body"><div class="rp-card-meta">Identifying a first-generation Bubbleback?</div><div class="rp-card-title">[[Reference:1858|1858]]</div><div class="rp-card-text">The Field Manual identifies ref. 1858 as the first Bubbleback and lists Cal. 520. Catalogued watches carry dates of 1933, circa 1935, and the 1930s.</div></div></div>
 <div class="rp-card"><div class="rp-card-body"><div class="rp-card-meta">Cross-checking a two-piece case Bubbleback?</div><div class="rp-card-title">[[Reference:3131|3131]]</div><div class="rp-card-text">First two-piece case Bubbleback. The 1936 case simplification, precious-metal only (9K, 14K, 18K yellow and pink gold), Cal 620 with sub-seconds.</div></div></div>
 <div class="rp-card"><div class="rp-card-body"><div class="rp-card-meta">Working from a Luxury Model dial photo?</div><div class="rp-card-title">[[Reference:3372|3372]]</div><div class="rp-card-text">The "Luxury Model" name appears in period advertising; documented examples and manual entries show several bezel and seconds configurations.</div></div></div>
@@ Line 84: / Line 84: @@
 |-
 | [[Reference:3139|3139]] || c.1940–1942 || 10½′′′ Hunter, manual || 32mm cushion Oyster, 3-piece || Only Rolex with "Army" on the dial; cushion case in the Borgel-derived 1920s family; documented British military and civilian examples
+|-
+| [[Reference:3351|3351]] || Auction dates circa 1935 and 1940s; Dawsons estimates circa 1942; a collector post dates a pictured Seaforth circa 1942; run unknown ([https://jewelry.ha.com/c/item.zx?ic16=ViewItem-Auction-Archive-JumpLot-PreviousLot-050318&lotNo=56280&saleNo=5242 Heritage]; [https://www.christies.com.cn/en/lot/lot-4785368 Christie's]; [https://dawsons.blob.core.windows.net/main/Full%20Catalogue%20-%20May%202022%20Jewellery.pdf Dawsons]; [https://www.reddit.com/r/rolex/comments/fj0jvy Reddit]) || Cal. 59 reported on Standard/Regent/Lincoln examples; separate Extra Prima ([https://www.darlor-watch.com/rolex_watches_3.html Darlor 3351-F]; [https://www.christies.com/lot/lot-3057585 Christie's]) || 28–29mm; circular hooded-lug or cushion; steel, gilt/gold-filled and two-tone cases || Standard, Regent, Lincoln and Extra Precision labels; Seaforth/Observatory dial. Dealer archives write 3351-F/3351f; suffix meaning unresolved ([https://www.darlor-watch.com/rolex_watches_3.html Darlor]; [https://www.vintagewatch.ca/5629-antique-rolex-oyster-cushion-case-with-sweep-seconds-circa-1930/ Trebor])
 |-
 | [[Reference:3359|3359]] || c.1939–1947 || 10½′′′ Hunter, manual || 32mm tonneau Oyster, two-tone SS + pink gold || ''Viceroy''-signed dial; two-tone SS case with pink gold bezel; applied luminous numerals
@@ Line 100: / Line 102: @@
 |}
-== First Bubbleback (1933–1935) ==
+== First Bubbleback ==
-The first production Perpetual. Cal. 520 (Hunter 8¾′′′) with a full 360-degree rotor. Early examples carry the Didactic engravings: step-by-step service instructions in French cut directly into the movement plate.
+The Vintage Rolex Field Manual identifies ref. 1858 as the first Bubbleback and lists Cal. 520. Vintage & Prestige also lists Cal. 520 for stock W2107; Hodinkee's 2024 family guide assigns Cal. 620 to the first series beginning with ref. 1858. Antiquorum dates one example to 1933 and another to circa 1935; Phillips dates case 52,736 to circa 1935, while Antiquorum Hong Kong gives circa 1930s. WatchNet Japan lists a stainless-steel example, product A-6378, at 30.5 mm with a four-part case. Antiquorum, Aste Bolaffi, and WatchNet describe engraved watchmaker instructions on individual watches.
 {| class="wikitable" style="width:100%;"
@@ Line 108: / Line 110: @@
 ! Reference !! Production !! Movement !! Case !! Key distinction
 |-
-| [[Reference:1858|1858]] || 1933–1935 || Cal. 520, 17j || 32mm tonneau, 3/4-piece || First Bubbleback; Didactic movement; 60% Didactic split across 5 confirmed auction lots
+| [[Reference:1858|1858]] || Catalogued examples dated 1933, circa 1935, and 1930s || Field Manual and dealer listings attribute Cal. 520; Hodinkee assigns Cal. 620 to the first series; catalogues report 8¾ or 9¾ line and 17 or 19 jewels || 30.5–32 mm in individual listings; three-body and four-part cases || First Bubbleback per the Field Manual; instructions engraved on several catalogued movements
 |}
@@ Line 163: / Line 165: @@
 |-
 | [[Reference:4467|4467]] || 1945–1949 || Cal. A.295 (= 740/745), 18j || 36mm 18K YG/PG tonneau, 2-piece || Early Datejust; early Jubilee and solid end-link configuration; ''Ovettone''; date wheel evolves all-black → all-red → roulette
+|-
+| [[Reference:4984|4984]] || Christie's/HENRY's c.1940s–c.1945 (likely same watch); About Time estimates c.1947; span unknown || Automatic; caliber not identified; movement nos. N15927 (likely repeat sale) and N880639 || ~32mm; pink- and yellow-gold examples || Two photographed watches; individual two-tone and silver dial descriptions; no factory variant range established
 |-
 | [[Reference:5030|5030]] || circa 1948 || Cal. A.295 / 740 (see reference-specific sources) || 36mm; solid gold examples || Early date-equipped Oyster Perpetual; paired with the 5031 in some collector usage
@@ Line 171: / Line 175: @@
 |-
 | [[Reference:6074|6074]] || Platinum commission dated 1950; gold attributions circa 1950s unresolved || Cal. 630 NA on one gold watch with reworked caseback; 9¾-ligne/17j on platinum lot; no reference-wide assignment || 34–36mm in separate catalogues || Platinum example has smooth bezel; gold examples need attribution checks
+|-
 | [[Reference:6075|6075]] || Auction dates include 1950–51; one c.1961 estimate conflicts || A.295 and A.296 attributed in separate catalogues || 35–36mm; 18K YG/PG and steel + YG; one 10K YG catalogue description || Gold, pink-gold and two-tone cases; one photographed Datejust dial is graded restored
 |-
 | [[Reference:6105|6105]] || Early 1950s; catalogue dates vary || A.296 and 745-attributed examples || 36mm; gold and two-tone examples || Early dial-signed Datejust; often credited as first, but factory first use is not settled by the 6075 restored dial
+|}
+== Large no-date Oyster Perpetual: ref. 5026 ==
+Ref. 5026 is documented in 36 mm steel automatic examples with subsidiary seconds. Auction catalogues date individual watches from circa 1946 to circa 1958, but those estimates do not define the reference's production span. Aste Bolaffi assigns automatic Cal. 720/18 jewels to case 443371; other catalogues do not name a caliber. [[Reference:5026|The reference article]] records the case, dial, movement, and bracelet evidence. [https://onlineonly.christies.com/s/christies-watches-online-time-travel/rolex-steel-bubble-back-enamel-dial-ref-5026-123/71687 Christie's, lot 123] [https://www.astebolaffi.it/en/lot/257/4/detail Aste Bolaffi, lot 4] [https://catalog.antiquorum.swiss/en/lots/rolex-ref-5026-lot-297-239 Antiquorum, lot 239]
+== Large no-date Oyster Perpetual: ref. 5028 ==
+Ref. 5028 is a large, no-date automatic Oyster Perpetual catalogued in steel and 18K gold, usually grouped with the Ovettone Bubblebacks. Case measurements in sale records are 35–36 mm. Monaco Legend dates case 412191 to 1945; Christie's gives circa 1946 for that same case and dates case 493076 to 1946. Other dated examples include Monaco Legend case 411813 (1958) and an unnumbered Antiquorum watch dated to the 1960s. These catalogue dates do not establish a production span. Records show centre-seconds and dual-seconds dials; movement descriptions vary between 10½ and 11 lignes and do not settle a single caliber. See [[Reference:5028|the case and dial record for ref. 5028]]. [https://www.monacolegendauctions.com/auction/exclusive-timepieces-32/lot-47 Monaco Legend, 2023, lot 47] [https://www.christies.com/lot/lot-6590236 Christie's, New York 2026, lot 98] [https://www.christies.com/en/lot/lot-4795731 Christie's, Geneva 2006, lot 32] [https://www.monacolegendauctions.com/auction/exclusive-timepieces-22/lot-126 Monaco Legend, 2020, lot 126] [https://catalog.antiquorum.swiss/en/lots/rolex-lot-26-360 Antiquorum, 2002, lot 360]
+== Large no-date Oyster Perpetual: ref. 5029 ==
+Auction catalogues document separate 5029 examples dated circa 1947 and 1949, in two-tone steel and gold, yellow gold, and pink gold. The 35–36 mm cases carry different dial and bezel layouts. Catalogued movement descriptions vary between A.295, “Super Balance 730,” and 9¾-line, 18-jewel movements; each remains tied to its own example. [[Reference:5029|The reference article]] records the case-numbered evidence and disputed listings. [https://shop.hodinkee.com/products/1947-rolex-ref-5029-two-tone-oyster-perpetual-big-bubble Hodinkee, case 610727] [https://www.phillips.com/detail/rolex/87265 Phillips, lot 144] [https://catalog.antiquorum.swiss/en/lots/rolex-lot-262-295 Antiquorum, lot 295]
+== Late small Bubbleback examples ==
+Auction catalogues date individual ref. 5002 watches from circa 1945 to circa 1952, and ref. 5006 examples from 1948 into the 1950s. Dealer and auction listings also identify ref. 5045 examples around 1949–50; the Loupe This lot includes a photograph of the inner caseback stamp. The 5002 records describe 23–26 mm steel, two-tone, and gold cases; 5006 records give 29–30 mm steel and gold examples. For 5013, Doyle and Linckersdorff list solid-gold watches; Curious Curio, Cool Auction, and GMTBroker describe steel cases with gold bezels. The examined listings show several dial layouts, but do not establish their order or factory originality. Cool Auction assigns Cal. 630 / 630NA to its individual watch. A Rolex Forums chart gives 9.75 lignes, a size notation rather than a caliber. One marketplace listing describes a centre-seconds chapter-ring 5013, but its photograph shows no reference stamp or caseback, so that attribution is unverified. These dates and configurations belong to individual records, not production endpoints. Christie’s describes its circa-1940 ref. 6006 as a Bubble Back. Later Christie’s and Antiquorum catalogues document gold examples dated 1952–55, with both central and subsidiary seconds. The 1952 Antiquorum watch is case 927300, with Cal. 520 and a restored subsidiary-seconds dial. These lot dates do not establish production boundaries. See [[Reference:6006|the 6006 record]]. [https://www.christies.com/en/lot/lot-1588049 Christie’s, circa-1940 ref. 6006] [https://catalog.antiquorum.swiss/en/lots/rolex-lot-108-253 Antiquorum, case 927300] [https://www.christies.com/lot/lot-4700386 Christie’s, 1953 ref. 6006] [https://www.christies.com/en/lot/lot-4006241 Christie’s, circa-1955 ref. 6006] [https://catalog.antiquorum.swiss/en/lots/rolex-ref-5006-lot-272-142 Antiquorum, case 671819] [https://www.ebth.com/items/14105766-1948-rolex-oyster-perpetual-bubble-back-watch EBTH, item 14105766] [https://timeanagram.com/products/7593 TimeAnagram, product 7593] [https://www.arsvalue.com/en/lots/1423503/rolex-ovetto-5006-anni-50?nav=True Finarte, lot 33] [https://irp-cdn.multiscreensite.com/0b5fdf83/files/uploaded/1.0%20RolexBook-23Mar.pdf Vintage Rolex Field Manual, p. 107] [https://www.doyle.com/auction/lot/lot-1088---rolex-gold-oyster-perpetual-bubbleback-wristwatch-ref-5013/?lot=1446668&sd=1 Doyle, lot 1088] [https://www.ebay.de/itm/355515195857 Linckersdorff Berlin, item 355515195857] [https://curious-curio.jp/watch/52035 Curious Curio, stock CW-G346] [https://www.cool-auction.net/gallery/20125/ Cool Auction, stock 20125] [https://www.gmtbroker.com/gallery/Anonimo/ROLEX---BubbleBack-5013-ovetto-silver-dial-1948-photo852821.html GMTBroker, 5013 listing] [https://www.rolexforums.com/attachment.php?attachmentid=82672&d=1250802852 Rolex Forums model-to-caliber chart, 5013 row]
+{| class="wikitable" style="width:100%;"
+|-
+! Reference !! Production evidence !! Movement !! Case evidence !! Key distinction
+|-
+| [[Reference:5002|5002]] || Catalogue dates circa 1945–1952; run unverified || Automatic; Cal. 420 assignment uncertain because its catalogue describes centre-seconds, while 5002 lots describe subsidiary seconds || 23–26 mm in cited lots; steel, steel/pink gold, yellow gold, pink gold, and rose gold || Ladies’ Oyster Perpetual with subsidiary seconds; Field Manual lists /7 and /8 suffix descriptions, not tied to observed lots
+|-
+| [[Reference:5003|5003]] || Individual catalogue estimates circa 1949–1953; later 1960s estimates and a weak circa-1972 transcription conflict; run unverified || Automatic, subsidiary seconds; numeric caliber unidentified || 23–27 mm; steel, steel/gold, 10K and 18K gold examples || Ladies’ Oyster Perpetual; Field Manual lists /3, /7, /8 variants, not matched to auction examples
+|-
+| [[Reference:5006|5006]] || Individual records dated 1948 through the 1950s; run unverified || Automatic; Field Manual lists Chronometer Perpetual variants; numeric caliber unresolved || 29–30 mm; steel, steel with yellow- or rose-gold bezel, and gold listed || Mid-size suffix variants 5006/3 and 5006/7 in the Field Manual; auction dial descriptions differ
+|-
+| [[Reference:5010|5010]] || Catalogue examples circa 1945–1955; production span unverified || Automatic, centre seconds; 9¾-ligne size in catalogues, numbered caliber unresolved || Steel and two-tone; 31–33 mm in cited records || Oyster Perpetual grouped with Bubblebacks by collectors; Phillips records a 1950 Anno Sancto bezel. [https://www.christies.com/lot/lot-856369 Christie's] [https://catalog.antiquorum.swiss/en/lots/rolex-ref-5010-bubbleback-lot-313-136 Antiquorum] [https://www.phillips.com/detail/rolex/CH080515/282 Phillips] [https://electronicsandbooks.com/edt/manual/Art/Auction/Bonhams/2022/20220524%20S-27810-0-1%20Montres%20de%20Prestige.pdf Bonhams, lot 276]
+|-
+| [[Reference:5013|5013]] || Individual listings date examples to the 1940s; production span unknown || Automatic, subsidiary seconds; one seller assigns Cal. 630 / 630NA; reference-wide caliber unresolved || Approx. 32 mm; solid-gold and steel/gold examples listed || Cream Arabic-and-baton, Roman, wedge-marker, and silver Arabic dials appear in separate records; sequence and originality are not established
+|-
+| [[Reference:5045|5045]] || Individual examples dated circa 1949–50; production span unverified || Automatic; chart and dealer give different 9¾-line NA and 10½-line NA movement-size/family designations; no caliber established || 31–32 mm; steel and rose-gold or bi-color listings || Inner caseback stamp photographed on one example; silver 12-3-6-9 and wedge-marker dials appear in listings; one listing describes luminous markers around a circular minute track. [https://loupethis.com/auctions/rolex-bubbleback-5045-two-tone-pink-gold-and-steel Loupe This] [https://cticorp.jp/?p=44936 Watch CTI] [https://timeanagram.com/products/12221 TIMEANAGRAM]
+|-
+| [[Reference:5018|5018]] || Auction catalogues date examples from 1948 into the 1950s; one case receives conflicting 1949 and circa-1959 dates || Automatic, centre seconds; catalogues report 9¾-line and 17/19 jewels; numbered caliber unresolved || 32–34 mm in cited lots; steel, 18K gold, and steel/yellow-gold || Auction titles use Bombé and Bombay; catalogues show varied dial layouts. Production span remains unknown. [https://catalog.antiquorum.swiss/en/lots/rolex-lot-108-23 Antiquorum, case 608519] [https://www.christies.com/en/lot/lot-5367913 Christie’s, case 678865] [https://catalog.antiquorum.swiss/en/lots/rolex-ref-5018-oyster-perpetual-lot-344-297 Antiquorum, case 608632] [https://www.finarte.it/auction/fine-watches-milan-2025-06-09/rolex-oyster-perpetual-5018-137264?lang=en Finarte, case 670691]
 |}
@@ Line 186: / Line 226: @@
 |-
 | [[Reference:8171|8171]] || c.1949–1953 || Cal. A.295 CPL automatic triple calendar moonphase, in-house Aegler || 38mm non-Oyster snap caseback, 18K YG/PG, SS rare || Triple calendar + moonphase; ''Padellone''; published examples include stainless steel and gold cases
+|}
+== Ref. 4392 ==
+Auction catalogues identify ref. 4392 as an Oyster Perpetual and date individual examples from circa 1945 through one circa-1959 estimate. The records describe 31–32 mm steel and gold cases and identify Cal. 630 / 630NA in several watches. Antiquorum's case 607544 pairs a Cal. 630 catalogue attribution with a small-seconds dial it considers probably reprinted; its photos do not show the movement. [[Reference:4392|The reference article]] keeps these details tied to their individual catalogue records. [https://jewelry.ha.com/c/catalog-print.zx?ic5=CatalogHome-AucType-PrintableCatalog-071515&saleNo=5097 Heritage, lot 60319] [https://catalog.antiquorum.swiss/en/lots/rolex-ref-4392-bubble-back-stainless-steel-lot-383-105 Antiquorum, lot 105]
+== Ref. 4919 ==
+Auction catalogues identify ref. 4919 as an Oyster Perpetual and date individual examples from circa 1947 to the 1950s; Farsettiarte dates a caseback-marked example circa 1960. A secondary copy of an Antiquorum catalogue assigns one example to the 1930s, in conflict with those later dates; see [[Reference:4919|the 4919 article]] for the source and limits. None sets a production span. Auction descriptions and an undated technical table give an automatic 9¾-line movement, but no numeric caliber is confirmed. Collectors group 4919 with Bubblebacks. [https://catalog.antiquorum.swiss/en/lots/rolex-lot-221-365 Antiquorum, case 608098] [https://www.christies.com/en/lot/lot-1720329 Christie's] [https://www.farsettiarte.it/uploads/auctions/187-asta_257_Orologi_5_dicembre_2024.pdf Farsettiarte, lot 50] [https://www.vrfm.io/Scans/OYSTER-CROWNS-GUIDE.pdf Rolex Boîtes Oyster table]
+{| class="wikitable" style="width:100%;"
+|-
+! Reference !! Catalogue dates !! Movement !! Case evidence !! Distinction
+|-
+| [[Reference:4919|4919]] || One copied catalogue gives a 1930s outlier; others date examples circa 1947–1960; production span unknown || Automatic, 9¾-line in catalogues; numeric caliber unresolved || Steel with yellow- or pink-gold bezels; 31–34 mm in cited examples || Separate dial layouts include a Serpico y Laino-signed example; Tennants reports one caseback marked 4919 5011, unexplained
 |}
@@ Line 251: / Line 306: @@
 * [https://catalog.antiquorum.swiss/en/lots/rolex-lot-108-229 Antiquorum, "Mondani Collection, lot 229 — ref. 1858 Didactic, Bucherer-signed, 1933", Antiquorum, 2006]
 * [https://www.astebolaffi.it/en/lot/261/34/detail Aste Bolaffi, "Torino, lot 34 — Rolex Ovetto ref. 1858 Didactic", Aste Bolaffi, 2020]
+* [https://catalog.antiquorum.swiss/en/lots/rolex-lot-272-233 Antiquorum, Geneva, lot 233 — ref. 1858 case 48191, circa 1935]
+* [https://catalog.antiquorum.swiss/en/lots/rolex-ref-1858-bubble-back-gilt-dial-lot-345-47 Antiquorum, Hong Kong, lot 47 — ref. 1858 case 48449, circa 1930s]
+* [https://www.vintageandprestige.com/product/rolex-oyster-perpetual-bubbleback-1858/ Vintage & Prestige, stock W2107 — dealer-described 9K example]
+* [https://www.watchnet.co.jp/en/item/view/5300 WatchNet Japan, product A-6378 — ref. 1858, Cal. 520, four-part case, 30.5 mm]
+* [https://www.hodinkee.com/articles/the-rolex-bubbleback-and-why-it-still-matters Anthony Traina, Hodinkee, “The Rolex Bubbleback and Why It Still Matters”, 7 October 2024]
 * [https://catalog.antiquorum.swiss/en/lots/rolex-lot-83-146 Antiquorum, "Geneva, lot 146 — ref. 2136, steel cushion Oyster, c.1925", Antiquorum, 1999]
 * [https://www.sothebys.com/en/buy/auction/2020/watches-online/rolex-ref-3372-bubbleback-retailed-by-serpico-y Sotheby's, "Watches Online, lot 71 — ref. 3372, salmon dial, retailed by Serpico y Laino, c.1945", Sotheby's, 2020]
@@ Line 303: / Line 364: @@
 * [https://www.phillips.com/detail/rolex/CH080515/284 Phillips 2015, ref. 6075 A.296]
 * [https://www.cambiaste.com/uploads/auctions/807-cambi_orologi_719_2022_05_eb.pdf Cambi Aste 2022, ref. 6075 steel and gold]
+* [https://jewelry.ha.com/c/item.zx?ic16=ViewItem-Auction-Archive-JumpLot-PreviousLot-050318&lotNo=56280&saleNo=5242 Heritage Auctions, ref. 3351 Regent, case 118141, circa 1935]
+* [https://www.christies.com.cn/en/lot/lot-4785368 Christie's, ref. 3351 Standard, case 118412, circa 1940s]
+* [https://www.christies.com/lot/lot-3057585 Christie's, ref. 3351 Extra Precision, case 118404]
+* [https://dawsons.blob.core.windows.net/main/Full%20Catalogue%20-%20May%202022%20Jewellery.pdf Dawsons, ref. 3351 Lincoln, serial 170648, circa 1942]
+* [https://antiwatchman.com/products/detail.php?product_id=14533 AntiWatchman, ref. 3351 Regent and movement photograph]
+* [https://www.ebay.com/itm/227412128120 eBay seller watchnj, photographed ref. 3351 Seaforth / Observatory]
+* [https://wannabuyawatch.com/product/rolex-oyster-standard-ref-3351-boys-size-circa-1941/ Wanna Buy A Watch, ref. 3351 Standard]
+* [https://www.reddit.com/r/rolex/comments/fj0jvy Reddit r/rolex collector post, Seaforth ref. 3351, circa 1942 attribution]
+* [https://www.darlor-watch.com/rolex_watches_3.html Darlor Vintage Watches, ref. 3351-F, serial 118,489]
+* [https://www.vintagewatch.ca/5629-antique-rolex-oyster-cushion-case-with-sweep-seconds-circa-1930/ Trebor's Vintage Watches, ref. 3351f]
+* [https://electronicsandbooks.com/edt/manual/Art/Auction/Bonhams/2022/20220524%20S-27810-0-1%20Montres%20de%20Prestige.pdf Bonhams Paris, 24 May 2022, ref. 5010, lot 276]
+* [https://www.doyle.com/auction/lot/lot-1088---rolex-gold-oyster-perpetual-bubbleback-wristwatch-ref-5013/?lot=1446668&sd=1 Doyle, ref. 5013, lot 1088]
+* [https://www.ebay.de/itm/355515195857 Linckersdorff Berlin, ref. 5013, item 355515195857]
+* [https://curious-curio.jp/watch/52035 Curious Curio, ref. 5013, stock CW-G346]
+* [https://www.cool-auction.net/gallery/20125/ Cool Auction, ref. 5013, stock 20125]
+* [https://www.gmtbroker.com/gallery/Anonimo/ROLEX---BubbleBack-5013-ovetto-silver-dial-1948-photo852821.html GMTBroker, ref. 5013]
+* [https://www.rolexforums.com/attachment.php?attachmentid=82672&d=1250802852 Rolex Forums, model-to-caliber chart, ref. 5013 row]
+* [https://www.vetroplastica.it/referenze.html VetroPlastica, reference index, ref. 5013]
+* [https://marketplace.watchcharts.com/listing/5477111-fs-rolex-5013-oyster-perpetual-chapter-ring-dial Marketplace listing, centre-seconds chapter-ring description; reference attribution unverified]
 [[Category:Reference family]]
 [[Category:Bubbleback]]