![Reference 3940 | A platinum perpetual calendar wristwatch with moon phases, leap year and day/night indication, Circa 1990 | Important Watches | 2023 | Sotheby's Reference 3940 | A platinum perpetual calendar wristwatch with moon phases, leap year and day/night indication, Circa 1990 | Important Watches | 2023 | Sotheby's](https://sothebys-md.brightspotcdn.com/webnative/images/56/1b/f3644e7c431d8df70295052f5956/n11271-cp6pw-1.jpg)
Reference 3940 | A platinum perpetual calendar wristwatch with moon phases, leap year and day/night indication, Circa 1990 | Important Watches | 2023 | Sotheby's
![Sold at Auction: Patek Philippe. Extraordinary and Unique Perpetual Calendar Wristwatch in White Gold, Reference 3940 Second Series, Moon Phases, Original Box and Certificate. Special Order for Michael Ovitz. Sold at Auction: Patek Philippe. Extraordinary and Unique Perpetual Calendar Wristwatch in White Gold, Reference 3940 Second Series, Moon Phases, Original Box and Certificate. Special Order for Michael Ovitz.](https://image.invaluable.com/housePhotos/MonacoLegendAuctions/73/685673/H20679-L228569441.jpg)
Sold at Auction: Patek Philippe. Extraordinary and Unique Perpetual Calendar Wristwatch in White Gold, Reference 3940 Second Series, Moon Phases, Original Box and Certificate. Special Order for Michael Ovitz.
![Sold at Auction: PATEK PHILIPPE | RETAILED BY BEYER: REF 3940 YELLOW GOLD PERPETUAL CALENDAR WRISTWATCH WITH MOON-PHASES MADE IN 1986 Sold at Auction: PATEK PHILIPPE | RETAILED BY BEYER: REF 3940 YELLOW GOLD PERPETUAL CALENDAR WRISTWATCH WITH MOON-PHASES MADE IN 1986](https://image.invaluable.com/housePhotos/sothebys/08/634308/H0046-L157573116.jpg)
Sold at Auction: PATEK PHILIPPE | RETAILED BY BEYER: REF 3940 YELLOW GOLD PERPETUAL CALENDAR WRISTWATCH WITH MOON-PHASES MADE IN 1986
![Reference 3940 A pink gold automatic perpetual calendar wristwatch with moon phases and 24-hour indication, Made in 1993 | Fine Watches | 2021 | Sotheby's Reference 3940 A pink gold automatic perpetual calendar wristwatch with moon phases and 24-hour indication, Made in 1993 | Fine Watches | 2021 | Sotheby's](https://sothebys-md.brightspotcdn.com/dims4/default/0a7353a/2147483647/strip/true/crop/782x522+0+0/resize/2048x1367!/quality/90/?url=http%3A%2F%2Fsothebys-brightspot.s3.amazonaws.com%2Fmedia-desk%2F60%2F7c%2F2244c5ca4821b3c42b9ca9258092%2Fn10844-bthtg-glam-3.jpg)
Reference 3940 A pink gold automatic perpetual calendar wristwatch with moon phases and 24-hour indication, Made in 1993 | Fine Watches | 2021 | Sotheby's
![The Two Watch Collection: The Patek Philippe 3940 And The A. Lange & Söhne 1815 Chronograph - Hodinkee The Two Watch Collection: The Patek Philippe 3940 And The A. Lange & Söhne 1815 Chronograph - Hodinkee](https://hodinkee.imgix.net/uploads/images/1470145593058-lcn34oc5d6j-4f1d1f6da56f5247652a644ea6873e10/PP3940ALS1815-1.jpg?ixlib=rails-1.1.0&fm=jpg&q=55&auto=format&usm=12)
The Two Watch Collection: The Patek Philippe 3940 And The A. Lange & Söhne 1815 Chronograph - Hodinkee
Patek Philippe Perpetual Calendar – ref 5039 G – 18k White Gold (like ref 3940) – ASA College: Florida
![Patek Philippe 3940J 2nd Series MK1 - Unworn - Full-Set -... for $80,634 for sale from a Trusted Seller on Chrono24 Patek Philippe 3940J 2nd Series MK1 - Unworn - Full-Set -... for $80,634 for sale from a Trusted Seller on Chrono24](https://cdn2.chrono24.com/images/uhren/30000190-32uahfxu04njmfzvw9oqdz1k-ExtraLarge.jpg)
Patek Philippe 3940J 2nd Series MK1 - Unworn - Full-Set -... for $80,634 for sale from a Trusted Seller on Chrono24
![Patek Philippe Perpetual Calendar Ref-3940 18k Yellow Gold Solid Caseback Papers Bj-1990 Germany | Watch Rapport Patek Philippe Perpetual Calendar Ref-3940 18k Yellow Gold Solid Caseback Papers Bj-1990 Germany | Watch Rapport](https://watchrapport.com/cdn/shop/products/b94df6edcd0a37222a445bfda0931d2a_1024x.jpg?v=1680302427)
Patek Philippe Perpetual Calendar Ref-3940 18k Yellow Gold Solid Caseback Papers Bj-1990 Germany | Watch Rapport
![Patek Philipe Perpetual Calendar Porcelain Dial 18K Rose Gold 3940 Wristwatch at 1stDibs | patek 3940g, patek philippe 3940, 3940 patek Patek Philipe Perpetual Calendar Porcelain Dial 18K Rose Gold 3940 Wristwatch at 1stDibs | patek 3940g, patek philippe 3940, 3940 patek](https://a.1stdibscdn.com/patek-philipe-perpetual-calendar-porcelain-dial-18k-rose-gold-3940-for-sale-picture-8/j_13183/1550582604236/i20_W5682_master.jpg?width=768)