Patek Philippe Perpetual Calendar 3940J '2nd series'

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The ref. 3940 is the Platonic ideal of a Patek Philippe, combining an exquisite dress watch with an ultra high-end complication.

At the height of the quartz crisis that decimated the Swiss watch industry, Patek released a duo of watches with perpetual calendar complications in 36 mm cases. The ref. 3940 housed this unique complication in a beautiful dressy case. The watch was notably worn by Thierry Stern, patriarch of the Stern family that owns Patek Philippe. This 3940J is housed in a yellow gold case with a matching yellow gold screw down case back. The champagne dial sports 18k yellow-gold pointed baton indexes and elegant 18k yellow-gold dauphine hands. Two apertures at the 12 o’clock position reveal the day and month mechanism. The complications are displayed on three recessed sub-dials. The sub-dial at the 9 o’clock position indicates the day of the week as well as a 24-hour hand, while the sub-dial at 3 incorporates the month and a leap year indicator. Finally on the lower sub-dial we find a charming moon phase indicator, which is surrounded by a date complication. Officially, the 3940 was only produced between 1985 and 2007 and this example dates back to 1990.

The watch comes on a black alligator leather Patek Philippe strap together with a yellow gold deployant clasp and a Extract from the Patek Philippe Archives.


  • SKU 7239
  • Case Dimensions

  • Reference


  • Year

  • Extracts from the Archive


Packages are generally dispatched within 2 days after receipt of payment and are shipped within the Netherlands by Registered Mail through the Dutch carrier PostNL and for other countries by Fedex. Consult us if you prefer another method of shipping. For most destinations tracking is available.