Reference:Serial-numbers: Difference between revisions

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For [[Reference:1601|ref. 1601]], Phillips lists case number 926196 on a watch dated circa 1963. Sotheby’s records case 1,267,924 on a circa-1966 example, 3'835'110 on a circa-1974 watch, and 4'201'060 on a circa-1976 watch. Use these catalogue pairings to compare individual 1601s; the general serial chart remains an estimate and the pairings do not establish production years. [https://www.phillips.com/detail/rolex/106298 Phillips, lot 880]; [https://www.sothebys.com/en/buy/auction/2025/fine-watches-3/reference-1601-datejust-a-stainless-steel Sotheby’s, lot 694]; [https://www.sothebys.com/en/buy/auction/2024/important-watches-2/reference-1601-datejust-a-yellow-gold-automatic Sotheby’s, lot 130]; [https://www.sothebys.com/en/buy/auction/2020/important-watches-9/reference-1601-datejust-a-yellow-gold-automatic Sotheby’s, lot 44].

For ref. [[Reference:5052|5052]], Christie’s gives case 653977 and dates its pink-gold watch to the 1940s; Stockholms Auktionsverk records steel case serial 663654 with a 1950s estimate. These nearby numbers do not fix the watches to those decades: the numeric sequence was reused, and the published dates remain catalogue estimates. Anderson & Garland's 5052-attributed watch has only the prefix 663xxx, so it cannot be matched to case 663654 from the number alone. [https://www.christies.com/en/lot/lot-1472920 Christie’s, case 653977] [https://auctionet.com/fi/2105792-rolex-bubleback-rannekello-teras-automaatti-1950-luku Stockholms Auktionsverk, case 663654] [https://www.andersonandgarland.com/auction/lot/lot-421---a-rolex-oyster-perpetual-stainless-steel-wristwatch/?lot=371857&sd=1 Anderson & Garland, lot 421]

For ref. [[Reference:8952|8952]], Sotheby’s dates case 351,427 circa 1952. Crescent Watch Guys' chart puts that number in both a mid-1940s pre-reset range and a late-1950s post-reset range. The chart is an estimate; keep Sotheby’s date attached to its catalogue entry. [https://www.sothebys.com/buy/86de210f-86a9-4599-a8b9-bef3d3bfed75/lots/83afeb8b-1684-4fb2-9c38-0fe31a484dfe Sotheby’s, lot 8932]; [https://crescentwatchguys.com/pages/rolex-serial-numbers Crescent Watch Guys serial chart].

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=== Oyster Perpetual Date 1504 dated examples ===

Auction and dealer records date individual 1504 watches: Phillips dates white-gold case 1,420,737 to circa 1966; Estates Consignments dates yellow-gold case 2,537,128 to 1970; Eguchi lists case serial 2714*** as 1971; ~~Bulang & Sons~~ assigns its masked 27xxxx serial to 1972; EveryWatch preserves a yellow-gold auction description dated circa the 1970s for case 2,472,771. Sotheby’s 2019 catalogue repeats Phillips’s case 1,420,737, so it is the same watch, not another dated specimen. These are lot and dealer dates, not a serial-year chart or production limits. [https://www.dist.phillips.com/content/web/auctions/HK080216/HK080216_zh_1.pdf Phillips, case 1,420,737]; [https://www.estatesconsignments.com/product/rolex-oyster-perpetual-date-ref-1504-mens-18k-yellow-gold-moreau-gold-bezel-and-band-1970/ Estates Consignments, case 2,537,128]; [https://eguchi-store.jp/stocklist/287626/ Eguchi, serial 2714***]; [https://bulangandsons.de/products/rolex-oyster-perpetual-date-grey-brick-dial-moreau-finish-with-brick-bracelet-ref-1504-in-18-k-yellow-gold-w3674 ~~Bulang & Sons~~, masked serial 27xxxx]; [https://everywatch.com/rolex/1504/watch-2725687 EveryWatch archive, case 2,472,771].

Auction and dealer records date individual 1504 watches: Phillips dates white-gold case 1,420,737 to circa 1966; Estates Consignments dates yellow-gold case 2,537,128 to 1970; Eguchi lists case serial 2714*** as 1971; The W3674 listing assigns its masked 27xxxx serial to 1972; EveryWatch preserves a yellow-gold auction description dated circa the 1970s for case 2,472,771. Sotheby’s 2019 catalogue repeats Phillips’s case 1,420,737, so it is the same watch, not another dated specimen. These are lot and dealer dates, not a serial-year chart or production limits. [https://www.dist.phillips.com/content/web/auctions/HK080216/HK080216_zh_1.pdf Phillips, case 1,420,737]; [https://www.estatesconsignments.com/product/rolex-oyster-perpetual-date-ref-1504-mens-18k-yellow-gold-moreau-gold-bezel-and-band-1970/ Estates Consignments, case 2,537,128]; [https://eguchi-store.jp/stocklist/287626/ Eguchi, serial 2714***]; [https://bulangandsons.de/products/rolex-oyster-perpetual-date-grey-brick-dial-moreau-finish-with-brick-bracelet-ref-1504-in-18-k-yellow-gold-w3674 W3674 listing, masked serial 27xxxx]; [https://everywatch.com/rolex/1504/watch-2725687 EveryWatch archive, case 2,472,771].

=== Oyster Perpetual Date 1506 dated examples ===

Auction catalogues date ref. [[Reference:1506|1506]] case 1,117,252 to 1964, case 1,063,296 to circa 1965, and case 1,525,920 to 1967. The first two case numbers run opposite to their catalogue dates, so keep each date attached to its specific watch rather than treating these examples as a serial-year sequence. A seller-dated 1960 example has no visible case number in the available photographs. None of these records establishes the reference’s production span. [https://www.christies.com/lot/lot-5158504 Christie’s, case 1,117,252]; [https://jewelry.ha.com/itm/timepieces/wristwatch/rolex-fine-18k-oyster-perpetual-date-watch-with-chine-finish-ref-1506-circa-1965/a/5538-54133.s Heritage Auctions, case 1,063,296]; [https://catalog.antiquorum.swiss/en/lots/rolex-lot-206-127 Antiquorum, case 1,525,920]

=== Oyster Perpetual Date 1507 dated examples ===

Auction catalogues assign dates from circa 1962 to 1969 to individually numbered 1507 or 1503/1507 watches: case 928,501 (joint attribution) circa 1962; 1,144,916 circa 1964; 1,122,198 circa 1965; and 1,916,162 and 2,864,908 circa 1969. Sotheby’s’ circa-1964 estimate for 1,144,916 is later in the serial sequence than its circa-1965 estimate for 1,122,198. These estimates do not form a reliable serial chronology. A separate circa-1975 Christie's 1507 has no published case number. [https://www.barnebys.fr/ventes/objet/rolex-eYswah4-633694142 Barnebys archive of an Antiquorum listing, case 928,501]; [https://www.sothebys.com/en/auctions/ecatalogue/2019/watches-l19070/lot.1.html Sotheby’s, case 1,144,916]; [https://www.sothebys.com/en/buy/auction/2026/fine-watches-10/datejust-shantung-dial-pyramid-markers-reference Sotheby’s, case 1,122,198]; [https://jewelry.ha.com/itm/timepieces/rolex-ref-1507-oyster-perpetual-date-bark-finished-bezel-18k-gold-circa-1969/a/5422-54009.s Heritage, case 1,916,162]; [https://www.christies.com/lot/lot-rolex-date-ref-150718k-gold-self-winding-case-5091508/ Christie’s, case 2,864,908].

=== Oyster Perpetual Date 1510 dated examples ===

Christie’s dates case 1,598,902 to circa 1965 and case 1,691,443 to 1967; Phillips dates case 1,901,206 to circa 1968; Monaco Legend dates case 2,223,098 to 1969. Phillips re-listed the same Ricciardi watch in 2026 with case number 1,906,206, while movement, retailer mark, clasp stamp and paper dates match its 2019 record. Christie's dates serial 2,860,900 to circa 1971, while Gazette Drouot uses the same number for a hand-wound watch dated 1955–58. The conflicting movements and dates leave this serial unusable as a production boundary. Catalogue dates apply to individual watches; serial-number chronology remains unresolved. [https://www.christies.com/lot/lot-5841772 Christie’s, case 1,598,902]; [https://www.christies.com/lot/lot-5493400 Christie’s, case 1,691,443]; [https://www.phillips.com/detail/rolex/CH080319/4 Phillips 2019, case 1,901,206]; [https://www.phillips.com/detail/rolex/236697 Phillips 2026, case 1,906,206]; [https://www.monacolegendauctions.com/auction/exclusive-timepieces-15/lot-140 Monaco Legend, case 2,223,098]; [https://onlineonly.christies.com/s/watches-online-geneva-edit/rolex-yellow-gold-oyster-perpetual-date-zephyr-ref-1510-285/183944 Christie’s, serial 2,860,900]; [https://www.gazette-drouot.com/en/lots/25117066-rolex--22oyster-perpetual-date--- Gazette Drouot, serial 2,860,900].

=== Oyster Perpetual Date 1505 dated examples ===

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=== Prince dating examples ===

The table lists catalogue observations on Prince watches and related Eaton presentation pieces. “c.” means an approximate date assigned by the auctioneer. Hallmark readings and presentation inscriptions are identified separately. These examples do not define the start or end of a reference's production. The London import mark reported for ref. 1880 is distinct from the Glasgow and Edinburgh sequences; Christie’s dates that case mark to 1932, which dates assay rather than manufacture or sale. [https://www.christies.com/en/lot/lot-4642619 Christie’s, sale 5865, lot 410]

The table lists catalogue observations on Prince watches and related Eaton presentation pieces. “c.” means an approximate date assigned by the auctioneer. Hallmark readings and presentation inscriptions are identified separately. These examples do not define the start or end of a reference's production. Christie’s, Bonhams, Piguet and Sotheby’s date four individual ref. 1855 cases from circa 1930 through circa 1940. Their published descriptions do not report a Glasgow or Edinburgh import mark, so those dates remain catalogue estimates for the watches; the numbers do not establish a production span. The Bonhams caseback also carries the parachute trademark David Boettcher attributes to Robert Meylan; his case-making company was registered in 1928 and the trademark in 1934. Those registration dates identify the maker’s marks, not the manufacture date of case 14368. Boettcher says the crowned SAR mark remains unexplained. [https://www.vintagewatchstraps.com/myrolexpage.php David Boettcher, Rolex SAR and Robert Meylan case marks] The London import mark reported for ref. 1880 is distinct from the Glasgow and Edinburgh sequences; Christie’s dates that case mark to 1932, which dates assay rather than manufacture or sale. [https://www.christies.com/en/lot/lot-4642619 Christie’s, sale 5865, lot 410]

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

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|-

| [[Reference:1490|1490]] || 73,910 || steel || c.1936 || Bonhams Nov 2023 lot 50

|-

| [[Reference:1855|1855]] || 14368 || steel + rose gold; 25 Records, SAR and parachute marks inside back || c.1930, catalogue date || [https://www.bonhams.com/auction/23512/lot/21/ Bonhams, sale 23512 lot 21]

|-

| [[Reference:1855|1855]] || 14382 || steel + pink gold || c.1930, Christie's catalogue date || [https://www.christies.com/lot/lot-rolex-a-fine-and-rare-stainless-steel-4366792/ Christie's, lot 4366792]

|-

| [[Reference:1855|1855]] || 14413 || steel + pink gold; movement 77395 || 1930s, Piguet catalogue date || [https://production-static.piguet.com/sales/2754ef55-9043-4cff-b435-c37aa576f58b/specials/3378e48b-2897-4bfb-b9cf-cdb2bb46994f/catalog.pdf Piguet, lot 1592]

|-

| [[Reference:1855|1855]] || 31705 || 9-carat yellow gold || c.1940, Sotheby's catalogue date || [https://www.sothebys.com/en/auctions/2017/watches-sale-l17053.html Sotheby's London, lot 128]

|-

| [[Reference:1862|1862]] || 1,608 || 9K || Glasgow 1934 || Antiquorum 249-98

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== Per-reference serial detail ==

For chronograph ref. [[Reference:2057|2057]], Phillips identifies case 12'271 and dates it circa 1938; a 2026 FutureGrail caseback photograph shows the same number, while its catalogue transcription dates it circa 1927. Phillips' 2023 ref. 2022 catalogue refers back to the 2057 as case 12'272, one digit different. Preserve the discrepancy; these records do not establish a serial sequence or production span. [https://www.phillips.com/detail/rolex/CH080218/40 Phillips, 2018, lot 40]; [https://everywatch.com/rolex/2057/watch-32733221 EveryWatch transcription of FutureGrail, 2026, lot 32]; [https://www.phillips.com/detail/rolex/CH080223/170 Phillips, 2023, lot 170]

For the Oyster Perpetual ref. 1013, a Rago Arts & Auction Center lot dated serial 1,900,046 to 1969. Pergola's unofficial serial chart places that number in its 1968 range. These are conflicting estimates for one watch; neither establishes a production-year boundary for the reference. [https://www.ragoarts.com/auctions/2022/02/interesting-timepieces/508 Rago lot 508]; [https://rolexhaven.com/serial-numbers.html Pergola serial chart].

@@ Line 25: / Line 25: @@
 For [[Reference:1601|ref. 1601]], Phillips lists case number 926196 on a watch dated circa 1963. Sotheby’s records case 1,267,924 on a circa-1966 example, 3'835'110 on a circa-1974 watch, and 4'201'060 on a circa-1976 watch. Use these catalogue pairings to compare individual 1601s; the general serial chart remains an estimate and the pairings do not establish production years. [https://www.phillips.com/detail/rolex/106298 Phillips, lot 880]; [https://www.sothebys.com/en/buy/auction/2025/fine-watches-3/reference-1601-datejust-a-stainless-steel Sotheby’s, lot 694]; [https://www.sothebys.com/en/buy/auction/2024/important-watches-2/reference-1601-datejust-a-yellow-gold-automatic Sotheby’s, lot 130]; [https://www.sothebys.com/en/buy/auction/2020/important-watches-9/reference-1601-datejust-a-yellow-gold-automatic Sotheby’s, lot 44].
+For ref. [[Reference:5052|5052]], Christie’s gives case 653977 and dates its pink-gold watch to the 1940s; Stockholms Auktionsverk records steel case serial 663654 with a 1950s estimate. These nearby numbers do not fix the watches to those decades: the numeric sequence was reused, and the published dates remain catalogue estimates. Anderson & Garland's 5052-attributed watch has only the prefix 663xxx, so it cannot be matched to case 663654 from the number alone. [https://www.christies.com/en/lot/lot-1472920 Christie’s, case 653977] [https://auctionet.com/fi/2105792-rolex-bubleback-rannekello-teras-automaatti-1950-luku Stockholms Auktionsverk, case 663654] [https://www.andersonandgarland.com/auction/lot/lot-421---a-rolex-oyster-perpetual-stainless-steel-wristwatch/?lot=371857&sd=1 Anderson & Garland, lot 421]
 For ref. [[Reference:8952|8952]], Sotheby’s dates case 351,427 circa 1952. Crescent Watch Guys' chart puts that number in both a mid-1940s pre-reset range and a late-1950s post-reset range. The chart is an estimate; keep Sotheby’s date attached to its catalogue entry. [https://www.sothebys.com/buy/86de210f-86a9-4599-a8b9-bef3d3bfed75/lots/83afeb8b-1684-4fb2-9c38-0fe31a484dfe Sotheby’s, lot 8932]; [https://crescentwatchguys.com/pages/rolex-serial-numbers Crescent Watch Guys serial chart].
@@ Line 267: / Line 269: @@
 === Oyster Perpetual Date 1504 dated examples ===
-Auction and dealer records date individual 1504 watches: Phillips dates white-gold case 1,420,737 to circa 1966; Estates Consignments dates yellow-gold case 2,537,128 to 1970; Eguchi lists case serial 2714*** as 1971; Bulang & Sons assigns its masked 27xxxx serial to 1972; EveryWatch preserves a yellow-gold auction description dated circa the 1970s for case 2,472,771. Sotheby’s 2019 catalogue repeats Phillips’s case 1,420,737, so it is the same watch, not another dated specimen. These are lot and dealer dates, not a serial-year chart or production limits. [https://www.dist.phillips.com/content/web/auctions/HK080216/HK080216_zh_1.pdf Phillips, case 1,420,737]; [https://www.estatesconsignments.com/product/rolex-oyster-perpetual-date-ref-1504-mens-18k-yellow-gold-moreau-gold-bezel-and-band-1970/ Estates Consignments, case 2,537,128]; [https://eguchi-store.jp/stocklist/287626/ Eguchi, serial 2714***]; [https://bulangandsons.de/products/rolex-oyster-perpetual-date-grey-brick-dial-moreau-finish-with-brick-bracelet-ref-1504-in-18-k-yellow-gold-w3674 Bulang & Sons, masked serial 27xxxx]; [https://everywatch.com/rolex/1504/watch-2725687 EveryWatch archive, case 2,472,771].
+Auction and dealer records date individual 1504 watches: Phillips dates white-gold case 1,420,737 to circa 1966; Estates Consignments dates yellow-gold case 2,537,128 to 1970; Eguchi lists case serial 2714*** as 1971; The W3674 listing assigns its masked 27xxxx serial to 1972; EveryWatch preserves a yellow-gold auction description dated circa the 1970s for case 2,472,771. Sotheby’s 2019 catalogue repeats Phillips’s case 1,420,737, so it is the same watch, not another dated specimen. These are lot and dealer dates, not a serial-year chart or production limits. [https://www.dist.phillips.com/content/web/auctions/HK080216/HK080216_zh_1.pdf Phillips, case 1,420,737]; [https://www.estatesconsignments.com/product/rolex-oyster-perpetual-date-ref-1504-mens-18k-yellow-gold-moreau-gold-bezel-and-band-1970/ Estates Consignments, case 2,537,128]; [https://eguchi-store.jp/stocklist/287626/ Eguchi, serial 2714***]; [https://bulangandsons.de/products/rolex-oyster-perpetual-date-grey-brick-dial-moreau-finish-with-brick-bracelet-ref-1504-in-18-k-yellow-gold-w3674 W3674 listing, masked serial 27xxxx]; [https://everywatch.com/rolex/1504/watch-2725687 EveryWatch archive, case 2,472,771].
+=== Oyster Perpetual Date 1506 dated examples ===
+Auction catalogues date ref. [[Reference:1506|1506]] case 1,117,252 to 1964, case 1,063,296 to circa 1965, and case 1,525,920 to 1967. The first two case numbers run opposite to their catalogue dates, so keep each date attached to its specific watch rather than treating these examples as a serial-year sequence. A seller-dated 1960 example has no visible case number in the available photographs. None of these records establishes the reference’s production span. [https://www.christies.com/lot/lot-5158504 Christie’s, case 1,117,252]; [https://jewelry.ha.com/itm/timepieces/wristwatch/rolex-fine-18k-oyster-perpetual-date-watch-with-chine-finish-ref-1506-circa-1965/a/5538-54133.s Heritage Auctions, case 1,063,296]; [https://catalog.antiquorum.swiss/en/lots/rolex-lot-206-127 Antiquorum, case 1,525,920]
 === Oyster Perpetual Date 1507 dated examples ===
 Auction catalogues assign dates from circa 1962 to 1969 to individually numbered 1507 or 1503/1507 watches: case 928,501 (joint attribution) circa 1962; 1,144,916 circa 1964; 1,122,198 circa 1965; and 1,916,162 and 2,864,908 circa 1969. Sotheby’s’ circa-1964 estimate for 1,144,916 is later in the serial sequence than its circa-1965 estimate for 1,122,198. These estimates do not form a reliable serial chronology. A separate circa-1975 Christie's 1507 has no published case number. [https://www.barnebys.fr/ventes/objet/rolex-eYswah4-633694142 Barnebys archive of an Antiquorum listing, case 928,501]; [https://www.sothebys.com/en/auctions/ecatalogue/2019/watches-l19070/lot.1.html Sotheby’s, case 1,144,916]; [https://www.sothebys.com/en/buy/auction/2026/fine-watches-10/datejust-shantung-dial-pyramid-markers-reference Sotheby’s, case 1,122,198]; [https://jewelry.ha.com/itm/timepieces/rolex-ref-1507-oyster-perpetual-date-bark-finished-bezel-18k-gold-circa-1969/a/5422-54009.s Heritage, case 1,916,162]; [https://www.christies.com/lot/lot-rolex-date-ref-150718k-gold-self-winding-case-5091508/ Christie’s, case 2,864,908].
+=== Oyster Perpetual Date 1510 dated examples ===
+Christie’s dates case 1,598,902 to circa 1965 and case 1,691,443 to 1967; Phillips dates case 1,901,206 to circa 1968; Monaco Legend dates case 2,223,098 to 1969. Phillips re-listed the same Ricciardi watch in 2026 with case number 1,906,206, while movement, retailer mark, clasp stamp and paper dates match its 2019 record. Christie's dates serial 2,860,900 to circa 1971, while Gazette Drouot uses the same number for a hand-wound watch dated 1955–58. The conflicting movements and dates leave this serial unusable as a production boundary. Catalogue dates apply to individual watches; serial-number chronology remains unresolved. [https://www.christies.com/lot/lot-5841772 Christie’s, case 1,598,902]; [https://www.christies.com/lot/lot-5493400 Christie’s, case 1,691,443]; [https://www.phillips.com/detail/rolex/CH080319/4 Phillips 2019, case 1,901,206]; [https://www.phillips.com/detail/rolex/236697 Phillips 2026, case 1,906,206]; [https://www.monacolegendauctions.com/auction/exclusive-timepieces-15/lot-140 Monaco Legend, case 2,223,098]; [https://onlineonly.christies.com/s/watches-online-geneva-edit/rolex-yellow-gold-oyster-perpetual-date-zephyr-ref-1510-285/183944 Christie’s, serial 2,860,900]; [https://www.gazette-drouot.com/en/lots/25117066-rolex--22oyster-perpetual-date--- Gazette Drouot, serial 2,860,900].
 === Oyster Perpetual Date 1505 dated examples ===
@@ Line 315: / Line 325: @@
 === Prince dating examples ===
-The table lists catalogue observations on Prince watches and related Eaton presentation pieces. “c.” means an approximate date assigned by the auctioneer. Hallmark readings and presentation inscriptions are identified separately. These examples do not define the start or end of a reference's production. The London import mark reported for ref. 1880 is distinct from the Glasgow and Edinburgh sequences; Christie’s dates that case mark to 1932, which dates assay rather than manufacture or sale. [https://www.christies.com/en/lot/lot-4642619 Christie’s, sale 5865, lot 410]
+The table lists catalogue observations on Prince watches and related Eaton presentation pieces. “c.” means an approximate date assigned by the auctioneer. Hallmark readings and presentation inscriptions are identified separately. These examples do not define the start or end of a reference's production. Christie’s, Bonhams, Piguet and Sotheby’s date four individual ref. 1855 cases from circa 1930 through circa 1940. Their published descriptions do not report a Glasgow or Edinburgh import mark, so those dates remain catalogue estimates for the watches; the numbers do not establish a production span. The Bonhams caseback also carries the parachute trademark David Boettcher attributes to Robert Meylan; his case-making company was registered in 1928 and the trademark in 1934. Those registration dates identify the maker’s marks, not the manufacture date of case 14368. Boettcher says the crowned SAR mark remains unexplained. [https://www.vintagewatchstraps.com/myrolexpage.php David Boettcher, Rolex SAR and Robert Meylan case marks] The London import mark reported for ref. 1880 is distinct from the Glasgow and Edinburgh sequences; Christie’s dates that case mark to 1932, which dates assay rather than manufacture or sale. [https://www.christies.com/en/lot/lot-4642619 Christie’s, sale 5865, lot 410]
 {| class="wikitable" style="width:100%;"
@@ Line 366: / Line 376: @@
 |-
 | [[Reference:1490|1490]] || 73,910 || steel || c.1936 || Bonhams Nov 2023 lot 50
+|-
+| [[Reference:1855|1855]] || 14368 || steel + rose gold; 25 Records, SAR and parachute marks inside back || c.1930, catalogue date || [https://www.bonhams.com/auction/23512/lot/21/ Bonhams, sale 23512 lot 21]
+|-
+| [[Reference:1855|1855]] || 14382 || steel + pink gold || c.1930, Christie's catalogue date || [https://www.christies.com/lot/lot-rolex-a-fine-and-rare-stainless-steel-4366792/ Christie's, lot 4366792]
+|-
+| [[Reference:1855|1855]] || 14413 || steel + pink gold; movement 77395 || 1930s, Piguet catalogue date || [https://production-static.piguet.com/sales/2754ef55-9043-4cff-b435-c37aa576f58b/specials/3378e48b-2897-4bfb-b9cf-cdb2bb46994f/catalog.pdf Piguet, lot 1592]
+|-
+| [[Reference:1855|1855]] || 31705 || 9-carat yellow gold || c.1940, Sotheby's catalogue date || [https://www.sothebys.com/en/auctions/2017/watches-sale-l17053.html Sotheby's London, lot 128]
 |-
 | [[Reference:1862|1862]] || 1,608 || 9K || Glasgow 1934 || Antiquorum 249-98
@@ Line 650: / Line 668: @@
 == Per-reference serial detail ==
+For chronograph ref. [[Reference:2057|2057]], Phillips identifies case 12'271 and dates it circa 1938; a 2026 FutureGrail caseback photograph shows the same number, while its catalogue transcription dates it circa 1927. Phillips' 2023 ref. 2022 catalogue refers back to the 2057 as case 12'272, one digit different. Preserve the discrepancy; these records do not establish a serial sequence or production span. [https://www.phillips.com/detail/rolex/CH080218/40 Phillips, 2018, lot 40]; [https://everywatch.com/rolex/2057/watch-32733221 EveryWatch transcription of FutureGrail, 2026, lot 32]; [https://www.phillips.com/detail/rolex/CH080223/170 Phillips, 2023, lot 170]
 For the Oyster Perpetual ref. 1013, a Rago Arts & Auction Center lot dated serial 1,900,046 to 1969. Pergola's unofficial serial chart places that number in its 1968 range. These are conflicting estimates for one watch; neither establishes a production-year boundary for the reference. [https://www.ragoarts.com/auctions/2022/02/interesting-timepieces/508 Rago lot 508]; [https://rolexhaven.com/serial-numbers.html Pergola serial chart].