![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
The Keystone on Instagram: “Our yellow gold, second series @patekphilippe Perpetual Calendar 3940. Available now @the_keystone”
![Patek Philippe Watch 3940-014 | Men's Grand Complications Crocodile Leather Silver-tone Dial | The Watchery Patek Philippe Watch 3940-014 | Men's Grand Complications Crocodile Leather Silver-tone Dial | The Watchery](https://www.thewatchery.com/media/catalog/product/cache/3b4bd666f4b25971d8f9691f90297f7f/m/e/mens-grand-complications-crocodile-leather-silver-tone-dial-watch-patek-p-pk-3940014_1.jpg)
Patek Philippe Watch 3940-014 | Men's Grand Complications Crocodile Leather Silver-tone Dial | The Watchery
![Patek Philippe Perpetual Calendar 3940J 2nd Series MK1 -... for $89,153 for sale from a Trusted Seller on Chrono24 Patek Philippe Perpetual Calendar 3940J 2nd Series MK1 -... for $89,153 for sale from a Trusted Seller on Chrono24](https://cdn2.chrono24.com/images/uhren/25831217-jg8bqjtvnx6u9qdgx7y9zw7c-ExtraLarge.jpg)
Patek Philippe Perpetual Calendar 3940J 2nd Series MK1 -... for $89,153 for sale from a Trusted Seller on Chrono24
![Patek Philippe Ewiger Kalender Perpetual 18k Gold/, Ref. 3940... for $74,485 for sale from a Trusted Seller on Chrono24 Patek Philippe Ewiger Kalender Perpetual 18k Gold/, Ref. 3940... for $74,485 for sale from a Trusted Seller on Chrono24](https://cdn2.chrono24.com/images/uhren/29230020-di6fse7mkg1as2r3zl3e2jbe-ExtraLarge.jpg)
Patek Philippe Ewiger Kalender Perpetual 18k Gold/, Ref. 3940... for $74,485 for sale from a Trusted Seller on Chrono24
![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, REF. 3940, 1ST GENERATION, YELLOW GOLD | Important Modern & Vintage Timepieces | Geneva, May 11-12, 2019 PATEK PHILIPPE, REF. 3940, 1ST GENERATION, YELLOW GOLD | Important Modern & Vintage Timepieces | Geneva, May 11-12, 2019](https://antiquorum-swiss-assets.s3.us-west-2.amazonaws.com/images/321/lots/420/420.jpg)