This is the Patek Philippe Reference 3940G, a white gold perpetual calendar that holds a special place in the brand’s history. First introduced in 1985, the Ref 3940 marked a new era for Patek Philippe, featuring the ultra-thin automatic Caliber 240 Q movement. It was one of the first perpetual calendars made as a regular production model, helping to re-establish high-end mechanical watchmaking during a time of major threat to the traditional watch industry from Quartz models.
The white gold version is among the rarest and more sought-after variants of the reference. The case measures 36mm, offering classic proportions, while the clean, well-balanced silver dial shows day, date, month, leap year, and moonphase in a clear and elegant layout.
The Ref 3940 is known to be a favorite of Philippe Stern, Patek’s former president, which adds to its importance in the brand’s story. Today, it is seen as a landmark model—appreciated for its design, technical quality, and quiet presence on the wrist. As examples become harder to find, the 3940G stands out as a key piece for collectors interested in Patek Philippe’s modern heritage.
Its reliability, thin profile, and timeless aesthetic make it one of the most wearable grand complications ever produced by the brand. The condition of our example is flawless with a perfect dial and unpolished case. The complete set comes with its Original Certificate, winding box, spare back, and all accessories.
