Reference:bubbleback

Rolex Oyster & Bubbleback

Vintage Rolex Bubbleback advertisement

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.

Common entry points

Identifying a first-generation Bubbleback?

1858

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.

Cross-checking a two-piece case Bubbleback?

3131

First two-piece case Bubbleback. The 1936 case simplification, precious-metal only (9K, 14K, 18K yellow and pink gold), Cal 620 with sub-seconds.

Working from a Luxury Model dial photo?

3372

The "Luxury Model" name appears in period advertising; documented examples and manual entries show several bezel and seconds configurations.

Pre-Oyster / Submarine (1922–1926)

Rolex dates its Submarine to 1922 and describes a watch hinged inside a second case, with a screw-down bezel and crystal; reaching the crown required opening the outer case. David Boettcher distinguishes Hermetic watches sold under the Submarine name from watches branded Rolex. Jean Finger's 1921 Swiss patent CH 89276 describes a stem-wound watch with a protective case. Boettcher notes that Wilsdorf's 1922 British patent describes the same case design but does not name Finger. Rolex, “Building an impenetrable defence”; Boettcher, “Rolex Hermetic”; Boettcher, “Rolex Submarine?”

Reference	Production	Movement	Case	Key distinction
3666	Cargills catalogue: 1924; Bonhams: circa 1925	Manual, 15 jewels in catalogues; caliber unconfirmed	32–33mm silver hinged-case Hermetique	Cargills calls its watch “Submarine Hermetique” and reports Rolex signatures; Phillips catalogues a separate 1940 chronograph as ref. 3666 (Bold Timepieces; Bonhams; Watches of Knightsbridge, lot 376; Phillips)

Pre-Perpetual Oyster

Before the Bubbleback, Rolex produced manual-wind Oysters. Auction catalogues identify several with 10½- or 9¾-ligne Aegler Hunter movements at Prima, Extra Prima or Ultra Prima grades. Ref. 1925 lots also name Prima and Ultra Prima grades, but do not assign a numeric caliber. Glasgow import hallmarks recur on British-market examples; the assay date belongs to the case, not necessarily the watch’s manufacture.

Reference	Production	Movement	Case	Key distinction
1925	Christie’s dates examples circa 1925, 1928 and to the 1930s; Antiquorum: 1920s; production span unknown	Prima (9′′′/15j and six-position description) and Ultra Prima (15j); caliber unconfirmed	Cushion, faceted tonneau and octagonal; 28 × 28 to 32 × 31mm; gold, silver, nickel	Lot-specific dials; Vintage & Prestige stock W3770 reproduces a 1930 guarantee recording sale on a Milanese band; 260554 is a British winding-crown patent number, while its role in the Bonhams watch’s catalogue field remains unverified
2081	Auction dates range from the 1920s to 1948; span unproved	10-ligne/15-jewel Prima and 10½-ligne/17-jewel lots; one 1947 lot names Cal. 700, 10½-ligne/15-jewel Extra-Prima	Cushion, 31–32mm; stainless steel, 9K gold and chrome-plated examples	“Standard Oyster,” “Oyster Imperial” and “Oyster Chronometer” catalogue labels; Antiquorum’s steel-only note conflicts with gold and chrome-plated lots
1069	Antiquorum dates lots to 1920s; Christie's circa 1930; span unproved	Manual; 11-ligne/15j movement reported once; other descriptions differ	Cushion; catalogued 30–32mm, steel and silver-plated examples	Solar Aqua/Anti-Magnetic dial; caseback 21836 has a conflicting 1940s seller date
1072	Auctions date examples to the 1930s, circa 1938, and 1940s; one dealer assigns circa 1927, span unresolved	10-ligne/18j and 15-jewel Prima descriptions; caliber unconfirmed	Cushion, 31–34mm; stainless-steel and chrome descriptions	Silvered Arabic, gilt-baton, two-tone 24-hour, and one Bucherer-signed dealer dial record
1073	Antiquorum circa 1926; Christie's circa 1930; Bonhams 1930s; dealer 1934; production span unproved	Antiquorum: 10½-ligne Extra Prima, 15j; other auction lots name Prima grades	Cushion, 31–32mm; stainless-steel and chrome descriptions	Enamel Breguet, silvered Arabic, Roman, and one dealer-described California dial
2136	c.1926–1940	10½′′′ Hunter, 15j manual	32–34mm octagonal / cushion	Early manual-wind gold Oyster; Borgel-lineage three-piece construction; same reference reused c.1960 for a Cal. 1400 Precision
34075	Christie’s dates the individual watch 1926; Sotheby’s reports Glasgow marks for 1926/1927; production series unproved	9¾-ligne Hunter upgraded to Cal. 600, 17j (Sotheby’s)	9ct gold octagonal case, wire lugs, 31 × 27mm (Christie’s)	Gleitze’s ‘Companion Oyster’; Christie’s calls it No. 34075, Sotheby’s calls it reference 34075; single object record
2849	Christie’s dates examples circa 1936, 1938 and 1940; Antiquorum dates two cases to 1937; production span unproved	Christie’s describes 18-jewel lever/Hunter movements; Antiquorum attributes 17-jewel Cal. 500 to two 1937 watches, with one lot’s stated caliber dates conflicting	32–33mm; steel examples and one steel-and-gold catalogue description, disputed against a steel-only note	Broad stepped bezel; period “Oyster De Luxe” wording and later “Lifesaver” nickname
3003 · 3004	1937 launch	Manual lever movements; two auction lots describe 10-line, 15- and 17-jewel examples	One catalogued 3003 is 27mm steel/pink gold; one 3004 is 30mm steel	First pair listed under Oyster Precision; documented examples differ in case and seconds layout
1873	Most auction dates c.1930–1940; Cambi lists c.1954	Manual; 15–18j; Extra Prima and Ultra Prima grades	31–32mm; seven steel entries, one 9K gold; tonneau-form cases catalogued	Eight auction entries; one flat-back title; Cambi describes central seconds

Other manual-wind Oyster references

Manual-wind Oyster references ran alongside the automatic Bubbleback. Auction records describe tonneau or cushion cases and manual movements; the automatic Bubbleback line used rotor movements.

Reference	Production	Movement	Case	Key distinction
1573	Auction examples dated circa 1930 through the 1940s; production span unknown	Manual; Antiquorum photo shows 15 jewels; Master of Time assigns Cal. 600 (17 jewels) to one Viceroy example; not confirmed across the reference	Tonneau/tortue; 28–29 × 38–39mm across catalogues; steel, steel/gold-bezel and 9ct gold examples	BEYER-signed black dial and Dobbies attribution documented; Imperial and Viceroy are sale names, not established production variants
2280	Auction examples circa 1935–1943; production span unconfirmed	Manual; 15–17 jewels in catalogues; Watch LIFE News identifies one pictured example as Cal. 710	Tonneau Oyster, 29–33 mm; steel, including one with a pink-gold bezel	Catalogue titles include Oyster Royal, Royal Observatory, Royalite, Majestic Observatory and Speedking; centre/subsidiary seconds, 12/24-hour and sector dials
2416	Catalogue examples and marks mainly mid-1930s to circa 1940; range unproved	Manual; 15 jewels reported on several lots; Christie’s also describes an Ultra Prima movement; one parts table lists 10½ lignes; numbered caliber unconfirmed	Cushion case, 27–28mm in 9ct examples; one 18ct example	Murdock’s Cape Town signature; one white Roman-numeral dial with soldered lugs; dealer-described “England Dial” and Speedking inscriptions; Oyster Watch Co. cases with Rolex/Aegler movements reported
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
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
3358	auction examples dated c.1940 and 1942; range unproved	Cal. 700 directly named on one lot; manual movement on another	Steel three-body Oyster with pink-gold bezel; catalogued diameters 28, 29 and 30mm	Separate Viceroy and Oyster Chronomètre dial descriptions; not an automatic Bubbleback
2765	c.1939–1942 catalogue dates; range unproved	10–10½-ligne manual, 17–18j; caliber unresolved	31–32mm steel tonneau Oyster; screw-down back and crown	Misclassified as a Bubbleback on collector lists; ten auction appearances represent eight watches
2784	individual catalogue estimates c.1930–1945; range unproved	Manual, 15–17j; FHF 30 is a family-level possibility (Tudor Cal. 59); no original 2784 movement confirms it	Usually 30–31mm barrel Oyster; steel and steel/gold documented	Junior Sport, Lipton, Viceroy, Raleigh, Centregraph and photographed Solar Aqua names
3009	range unproved; Glasgow import mark 1937 and presentation inscription 1947	Mostly catalogued manual, 17–18j; Cal. 700 family attribution probable; two repeated LSK automatic descriptions unresolved	30–33mm precious-metal tonneau Oyster	White enamel Scientific dial plus Observatory, 24-hour, California and silvered layouts
3096	Bonhams c.1930; Sotheby’s c.1937; span unproved. Gardiner Houlgate reports 1937 Glasgow import marks on the watch with serial 41066	Manual winding on Bonhams example; 18-jewel/six-position and jewelled-lever descriptions elsewhere; caliber unconfirmed	30mm gold cushion case; 9ct/9K in three records; Gardiner Houlgate describes hooded lugs	“Oyster Chronometer” wording; central seconds on one example and subsidiary seconds on three
4220	c.1944–1948	Cal. 59 manual, 17j	30mm tonneau Oyster SS	Speedking line; California dial; a documented 1940s small-Oyster manual-wind configuration

First Bubbleback (1933–1935)

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.

Reference	Production	Movement	Case	Key distinction
1858	1933–1935	Cal. 520, 17j	32mm tonneau, 3/4-piece	First Bubbleback; Didactic movement; 60% Didactic split across 5 confirmed auction lots

Two-piece case era (1936–1944)

Rolex introduced a two-piece Bubbleback case with refs. 3131 and 3132 in 1936. Other references still appear in catalogues as three-body cases, including the 3134. Cal. 620 (subsidiary seconds) and Cal. 630 (sweep seconds) became the dominant automatic calibers, developed by Emile Borer at Aegler.

Reference	Production	Movement	Case	Key distinction
2240	1930s–1940s catalogue dates; range unproved	9¾-ligne automatic, 19j, centre seconds; caliber unresolved	32mm steel tonneau; back profile unshown on specialist-catalogued examples	Bubbleback classification probable; a separately attributed watch has a domed back but no published reference engraving
3131	1936–1948	Cal. 620, 17j, sub-seconds	32mm tonneau, 2-piece	First two-piece case Bubbleback; precious-metal only (9K/14K/18K YG & PG)
3134	c.1939–1957 catalogue dates; production span unknown	Automatic; 9½ and 9¾ lignes reported; caliber unresolved; subsidiary and centre seconds documented	32 mm in most catalogues, with 30, 32.5 and 33 mm outliers; tonneau, three-body descriptions	Steel, a steel/yellow-gold case and two steel/gold listings with alloy unspecified; California-dial originality unconfirmed
3135	1938–c.1945 catalogue dates	9¾-ligne automatic family; caliber unresolved; subsidiary and centre seconds documented	32–33mm steel tonneau; one example catalogued as two-body	Sector, Roman, radium, pink and 24-hour dials documented; manual-wind listing is a probable 3135/3136 catalogue error
3599	1939–1946 catalogue dates	Early Perpetual family; Cal. 635 documented with subsidiary seconds	31–34mm catalogued, fitted hood covers	Mainly steel; wide flat bezel; fluted and smooth hoods; centre-seconds auction examples have unresolved caliber and factory status
3372	auction estimates c.1938–c.1959; factory range unconfirmed	Cal. 630 listed by Field Manual and named in one lot; other catalogues give 9¾-ligne / N 1411; centre and subsidiary seconds recorded	tonneau case; 32–33mm in cited lots; case and bezel variants	"Luxury Model" name reported in period advertising; 3372/0 listed with smooth polished bezel; dials need lot-specific originality checks

Straight-lug Empire Oyster

Collector Marcus Siems groups the straight-lug refs. 3548 and 3716 under the name Empire; Antiquorum says period advertisements used the Italian form “Impero.” The 3548 has centre seconds and the 3716 subsidiary seconds. Catalogue dates for 3716 examples range from circa 1940 to an outlying 1950s attribution, so the group does not supply a confirmed production span. See 3548 and 3716.

Reference	Production evidence	Movement	Case	Key distinction
3716	Catalogued circa 1940–46; one 1989 catalogue gives a 1950s date	9¾-ligne automatic; Cal. 620 / 635 assignments conflict	31–32 mm straight-lug case; steel, yellow and pink gold examples	Subsidiary seconds; paired in collector sources with centre-seconds ref. 3548

Early two-pusher Oyster chronograph (1939–mid-1940s)

The 3525 is commonly described as the first two-pusher chronograph in Rolex’s Oyster case; earlier Oyster-cased monopusher chronographs existed. Its one-piece upper case gave rise to the collector term Monoblocco. Some surviving examples have documented wartime orders and deferred payment, including those catalogued for Clive Nutting and Leon Brownlee.

Reference	Production	Movement	Case	Key distinction
3525	catalogue examples c.1940–1945; factory span unconfirmed	Cal. 13 / Valjoux 23 family, manual chronograph	~35mm monobloc Oyster SS/gold	Commonly described as an early two-pusher Oyster chronograph; earlier Oyster monopushers existed. Nutting example offered in 2007 with CHF 130,000–160,000 estimate; result not shown

First Datejust / Ovettone (1945–1953)

The 4467 launched in 1945 to mark Rolex's 40th anniversary. The 4467 article covers the early Datejust, its 36mm case, Jubilee bracelet and documented examples.

Reference	Production	Movement	Case	Key distinction
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
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
5031	auction dates range from circa 1948 to the 1960s	Automatic in sale catalogues; caliber unresolved	34–36mm in catalogues; steel and pink or yellow gold described	Date at 3; movement and case details vary by example
6031	auction dates include circa 1949–1950 and the 1950s	Automatic in catalogues; caliber unresolved	35–36mm; 18K yellow and pink gold catalogued	Date-equipped Oyster Perpetual; left-hand examples catalogued with crown at 9
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	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
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

Triple calendar: Padellone (1949–1953)

"Padellone" means "big pan" in Italian, an augmentative of padella ("pan") that follows the same naming logic as Ovetto/Ovettone. Triple calendar (day, month, date) plus moonphase. The Padellone uses a snap caseback rather than the screw-down construction of an Oyster case.

Reference	Production	Movement	Case	Key distinction
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

Post-Bubbleback / Super Oyster (1952–1953)

Cal. 1030, a bidirectional automatic, allowed Rolex to use a flatter caseback than the Bubbleback profile. A September 1953 letter from Bruno Vailati thanks Rolex for seven “Super Oyster” watches supplied to his Red Sea expedition; the letter does not identify them by reference. Perezcope attributes Vailati’s own watch to ref. 6098. Monaco Legend later used “Super Oyster” for ref. 6029, case 706020. Antiquorum dates that same case to 1950 and describes its domed, screw-down back. Abell Watchmakers calls a separately numbered ref. 6029 “Big Bubble Back.” These are source-specific labels, not evidence of a single model definition. Jose Pereztroika, “Pre-Submariner Scuba Diving With Rolex Oyster Watches” (2023) Monaco Legend Auctions, 2021, lot 181 Antiquorum, 2007, lot 254 Abell Watchmakers, ref. 6029, case 685762

Reference	Production	Movement	Case	Key distinction
6098	1952–1953	Cal. 1030 (or A.296), 25j, bi-directional	36mm Oyster, flat caseback	“Super Oyster” wording in Vailati’s 1953 letter for expedition watches; Perezcope attributes his watch to 6098

Related references

The Bubbleback era connects forward to:

• 6098 (Super Oyster, 60m water resistance in 1952; pre-Explorer and pre-Submariner ancestor)
• 6150 (first Explorer, 1952)
• 6204 (first Submariner, 1953)
• 4643 (square Perpetual; published labels vary. Dorotheum says period Rolex catalogues misprinted it as 4663; the Vintage Rolex Field Manual lists 4643 and 4663 separately, and the discrepancy remains unresolved.)
• 6305 (first Datejust with Cyclops, 1954)
• 6604 and 6605 (first Datejust with instantaneous date change, Cal. 1065, 1956–57)

Related families

• Air-King — the descendant line. The 1945 4925 / 4365 / 4499 originating Air-Kings sit in the same Bubbleback case architecture and run on the same Aegler hand-wound calibers.
• Prince — the parallel 1930s line. The Aegler-supplier relationship that powers the Prince also powers every Bubbleback caliber.
• Daytona — the chronograph ancestor. The pre-Daytona Antimagnetique, Monoblocco, and 4xxx tonneau Oyster chronographs share the same era and case lineage.

Shared references

• Serial numbers by year — early serial ranges and hallmark dating
• Movement reference — the calibers used across the Bubbleback line
• Bracelet & clasp guide — bracelet types, end-links, and clasp date codes

Sources

Primary and specialist

• Christie’s, ref. 2416, case 36789
• Christie’s, ref. 2416, case 36776, sale 5004 lot 98
• Christie’s, ref. 2416, case 36,848
• Schuler Auktionen, ref. 2416, case 32342
• Bonhams, ref. 3096, case 41164, circa 1930
• Gardiner Houlgate, ref. 3096, serial 41066, Glasgow import marks dated 1937
• Toovey’s, ref. 3096, caseback marked 4111/3096
• Sotheby’s, Watches 2020, ref. 3096, lot 51, circa 1937
• EveryWatch transcription of Sotheby’s lot 51
• David Boettcher, “Oyster Watch Co.”; FHF 30 and Tudor Cal. 59/59SC
• David Boettcher, Rolex 2416 examples in Oyster Watch Co. cases
• Scanned Oyster case-and-crown table, ref. 2416 row
• Watchnet Japan, ref. 2416 “England Dial” listing
• Sanderson & Son, ref. 2416 Speedking listing
• The Vintage Rolex Field Manual — Colin A. White, Morning Tundra
• David Boettcher, "The Rolex Oyster Case — Hermetic, Submarine and the Borgel lineage", vintagewatchstraps.com
• British patent GB260554A, “Improvements in keyless watches”
• Swiss patent CH114948A, “Winding watch”
• Owen Lawton, "The Oyster Story (Part 1)", Wind Vintage, 2022
• Charlie Dunne, "How Rolex Became Rolex: The Automatic Perpetual Movement, Part 2", Wind Vintage, 2023
• Tim Mosso, "The Golden Age of Rolex Movements, Part I", Quill & Pad, 2019
• Phillips, "The Geneva Watch Auction XII, lot 20 — ref. 1858, steel, bow-tie dial, c.1935", Phillips, 2020
• Antiquorum, "Mondani Collection, lot 229 — ref. 1858 Didactic, Bucherer-signed, 1933", Antiquorum, 2006
• Aste Bolaffi, "Torino, lot 34 — Rolex Ovetto ref. 1858 Didactic", Aste Bolaffi, 2020
• Antiquorum, "Geneva, lot 146 — ref. 2136, steel cushion Oyster, c.1925", Antiquorum, 1999
• Sotheby's, "Watches Online, lot 71 — ref. 3372, salmon dial, retailed by Serpico y Laino, c.1945", Sotheby's, 2020
• Antiquorum, New York 2001, lot 436 — ref. 3372, Cal. 630, centre seconds
• Antiquorum, Geneva 2006, lot 79 — ref. 3372, steel and 18K gold, three-body case
• Phillips, Geneva 2015, lot 206 — ref. 3372, two-tone case, four-segment dial
• Sotheby's, New York 2021, lot 166 — ref. 3372, steel, silvered dial
• Antiquorum, Hong Kong 2024, lot 75 — ref. 3372, steel, circa-1959 estimate
• Phillips, "The Geneva Watch Auction VII, lot 222 — ref. 4467, 18K yellow gold, roulette date, c.1945", Phillips, 2018
• Bonhams, "Lot 116 — ref. 4467, 18K yellow gold, purchased 6 August 1948, with Bucherer receipt and chronometer certificate", Bonhams
• Antiquorum, "Hong Kong, lot 95 — ref. 4467, 18K yellow gold, numbered souscription edition", Antiquorum, 2024
• Phillips in association with Bacs & Russo, "The Geneva Watch Auction NINE, 12 May 2019, lot 68 — ref. 8171 Padellone, 18K yellow gold, case 762'159", Phillips, 2019
• Christie's, "Important Watches, New York, sale 2753, 17 December 2013, lot 186 — ref. 8171 Padellone, stainless steel with diamond-set numerals, case 902'514", Christie's, 2013
• Sotheby's, "Important Watches, Hong Kong, 9 October 2020, lot 2143 — ref. 8171 Padellone, stainless steel, case 686'356", Sotheby's, 2020
• Bonhams, "Fine Watches and Wristwatches, London New Bond Street, 13 December 2017, lot 115 — 18K gold ref. 8171 Padellone, cal. A.295 CPL no. 20696", Bonhams, 2017
• Antiquorum, "Ref. 3525 chronograph, Corporal Clive Nutting provenance", Geneva, 2007
• Jose Pereztroika, "Pre-Submariner Scuba Diving With Rolex Oyster Watches", 2023
• Pandolfini Casa d'Aste, "Catalogue usage — Ovetto for 32mm Bubblebacks, Ovettone for 36mm Big Bubblebacks", Pandolfini

• Antiquorum Geneva, 1990, lot 397 — gold 6074 attribution
• Antiquorum Vicenza, 1992, lot 67 — platinum 6074
• Antiquorum Geneva, 2025, lot 223 — gold 6074 attribution

Editorial and market

• Abell Watchmakers, ref. 6029, case 685762, “Big Bubble Back”
• Monaco Legend Auctions, The Rolex Connoisseur's Collection Part Two, lot 181, ref. 6029, case 706020, 2021
• Antiquorum, Geneva, 11 November 2007, lot 254, ref. 6029, case 706020
• Vintage & Prestige, ref. 1925 stock W3770, Milanese bracelet and 1930 guarantee
• EveryWatch archive of Bonhams 2012 lot 127, ref. 2280 case 79,895
• Watch LIFE News / LowBEAT, ref. 2280 and Cal. 710 (Japanese, 2022)
• Sotheby’s New York, ref. 2280, lot 403
• Henrik Korpela, SJX Watches, 2015 — gold watch, movement and altered caseback
• Watchlover, 2016 — illustrated 6074 and smooth bezel

• Robb Report, "A Collector's Guide to Rolex Bubbleback Watches, 1931–1950s", Robb Report
• SJX, "Rolex Unicorns Part II — Ref. 8171 Triple Calendar Padellone in Steel", SJX Watches, 2019
• Robert-Jan Broer, "What Makes The Rolex Padellone Ref. 8171 So Special?", Fratello Watches, 2024
• Adrienne Faurote, "Close Up: $1.14 Million Rolex Reference 8171 Padellone", HauteTime, 2013
• Monochrome Watches, "The Evergreens: Complete History of the Rolex Datejust", Monochrome
• Edmond Saran, "Datejust: A Closer Look at a Rolex Icon", Le Monde Edmond
• Wind Vintage, "Rolex Oyster Perpetual Bubbleback Reference 3131", Wind Vintage
• Wind Vintage, "Rolex Oyster Perpetual Bubbleback Reference 3372 in 18K", Wind Vintage
• Caliber Corner, "Rolex Caliber 620", Caliber Corner
• Bob's Watches, "Rolex Bubble Back Collector's Guide", Bob's Watches
• Everest Bands, "The Rolex Bubbleback: History and Facts", Everest Bands
• Rolex Forums community, "Bubbleback 3131 Owners Thread", Rolex Forums
• Master of Time, Viceroy ref. 1573, dealer-attributed Cal. 600

• Antiquorum 2001, ref. 6075 steel and gold
• Antiquorum 2006, ref. 6075 restored Datejust dial
• Antiquorum 2014, ref. 6075 A.295
• Phillips 2015, ref. 6075 A.296
• Cambi Aste 2022, ref. 6075 steel and gold