Reference:Serial-numbers: Difference between revisions

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== Per-reference serial detail ==

Auction catalogues date ref. [[Reference:6609|6609]] cases 148,678 and 164,232 to circa 1956, cases 213,916 and 293,916 to circa 1956, cases 280,130, 280,389 and 284,956 to circa 1957, and cases 355,605, 382,912 and 388,431 to circa 1958. Phillips reports that the last of these has an inner caseback stamp reading II.1958. These are auction dates for individual watches, not factory production endpoints. Antiquorum dates case 447,272 to circa 1966, but the chart above places that number in Pergola’s 1959 band (437,255–530,168). Treat the catalogue date as a conflict; serial charts are estimates and do not date the 6609 production run.

The [[Reference:16520|Daytona 16520]] and individual manual-wind Daytona pages compare serials with dial and component changes. For long-running references such as the [[Reference:5500|Air-King 5500]], compare examples from the relevant period; one broad serial span cannot describe every configuration.

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== Sources ==

* [https://www.sothebys.com/en/auctions/ecatalogue/2018/watches-online-july-n09896/lot.19.html Sotheby's, ref. 6609 case 213916, circa 1956]

* [https://www.christies.com/en/lot/lot-6067485 Christie's, ref. 6609 case 148678, circa 1956]

* [https://www.monacolegendauctions.com/auction/exclusive-timepieces-25/lot-204 Monaco Legend, ref. 6609 case 164232, 1956]

* [https://www.christies.com/en/lot/lot-5892817 Christie's, ref. 6609 case 280130, circa 1957]

* [https://www.monacolegendauctions.com/auction/exclusive-timepieces-36/lot-46 Monaco Legend, ref. 6609 case 280389, 1957]

* [https://www.sothebys.com/en/buy/auction/2023/fine-watches-4/reference-6609-datejust-retailed-by-serpico-laino Sotheby's, ref. 6609 case 284956, circa 1957]

* [https://www.sothebys.com/en/buy/auction/2022/fine-watches-13/reference-6609-thunderbird-a-yellow-gold-automatic Sotheby's, ref. 6609 case 293916, circa 1956]

* [https://www.phillips.com/detail/rolex/138071 Phillips, ref. 6609 case 355605, circa 1958]

* [https://www.phillips.com/detail/rolex/CH080118/118 Phillips, ref. 6609 case 388431, inner caseback stamped II.1958]

* [https://catalog.antiquorum.swiss/en/lots/rolex-ref-6609-datejust-thunderbird-lot-327-106 Antiquorum, ref. 6609 case 447272, catalogue date circa 1966]

* [https://auctions.burstowandhewett.co.uk/catalogue/lot/42cd8c41aebfa8aff879eaa499a6cb9f/c87e406e317d82bb64ed7e2ebc5bb166/luxury-watches-fine-jewellery-and-silver-lot-1000/ Burstow & Hewett, ref. 6106 case 802568, circa 1952]

* [https://www.monacolegendauctions.com/index.php/auction/the-july-online-sale-34/lot-91 Monaco Legend, ref. 6106 case 803115, 1951]

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 == Per-reference serial detail ==
+Auction catalogues date ref. [[Reference:6609|6609]] cases 148,678 and 164,232 to circa 1956, cases 213,916 and 293,916 to circa 1956, cases 280,130, 280,389 and 284,956 to circa 1957, and cases 355,605, 382,912 and 388,431 to circa 1958. Phillips reports that the last of these has an inner caseback stamp reading II.1958. These are auction dates for individual watches, not factory production endpoints. Antiquorum dates case 447,272 to circa 1966, but the chart above places that number in Pergola’s 1959 band (437,255–530,168). Treat the catalogue date as a conflict; serial charts are estimates and do not date the 6609 production run.
 The [[Reference:16520|Daytona 16520]] and individual manual-wind Daytona pages compare serials with dial and component changes. For long-running references such as the [[Reference:5500|Air-King 5500]], compare examples from the relevant period; one broad serial span cannot describe every configuration.
@@ Line 644: / Line 646: @@
 == Sources ==
+* [https://www.sothebys.com/en/auctions/ecatalogue/2018/watches-online-july-n09896/lot.19.html Sotheby's, ref. 6609 case 213916, circa 1956]
+* [https://www.christies.com/en/lot/lot-6067485 Christie's, ref. 6609 case 148678, circa 1956]
+* [https://www.monacolegendauctions.com/auction/exclusive-timepieces-25/lot-204 Monaco Legend, ref. 6609 case 164232, 1956]
+* [https://www.christies.com/en/lot/lot-5892817 Christie's, ref. 6609 case 280130, circa 1957]
+* [https://www.monacolegendauctions.com/auction/exclusive-timepieces-36/lot-46 Monaco Legend, ref. 6609 case 280389, 1957]
+* [https://www.sothebys.com/en/buy/auction/2023/fine-watches-4/reference-6609-datejust-retailed-by-serpico-laino Sotheby's, ref. 6609 case 284956, circa 1957]
+* [https://www.sothebys.com/en/buy/auction/2022/fine-watches-13/reference-6609-thunderbird-a-yellow-gold-automatic Sotheby's, ref. 6609 case 293916, circa 1956]
+* [https://www.phillips.com/detail/rolex/138071 Phillips, ref. 6609 case 355605, circa 1958]
+* [https://www.phillips.com/detail/rolex/CH080118/118 Phillips, ref. 6609 case 388431, inner caseback stamped II.1958]
+* [https://catalog.antiquorum.swiss/en/lots/rolex-ref-6609-datejust-thunderbird-lot-327-106 Antiquorum, ref. 6609 case 447272, catalogue date circa 1966]
 * [https://auctions.burstowandhewett.co.uk/catalogue/lot/42cd8c41aebfa8aff879eaa499a6cb9f/c87e406e317d82bb64ed7e2ebc5bb166/luxury-watches-fine-jewellery-and-silver-lot-1000/ Burstow & Hewett, ref. 6106 case 802568, circa 1952]
 * [https://www.monacolegendauctions.com/index.php/auction/the-july-online-sale-34/lot-91 Monaco Legend, ref. 6106 case 803115, 1951]