Patek Philippe Perpetual Calendar Ref 3941, Rare 1989


Many watch collectors are familiar with Patek Philippe ref 3940, but few know of the 3941. When the 3940 was released in 1985, it featured a solid case back as had nearly every Patek before it. However, at the same time, a very low number of 3941s were released with clear case backs, making them among the first Patek Philippe watches to display the movement. In response to demand for presentation case backs, Patek began offering the 3940 with both solid and clear case backs. Ref 3941 was discontinued in 1990 after a run of less than 50 examples.

Patek Ref. 3940 is one of the iconic watches of the 1980s and the face of Patek Philippe Company in the modern era. Philippe Stern, the former CEO of Patek Philippe chooses this watch as his personal timepiece. In addition to aesthetic reasons to love the watch, the design of self-winding 240Q with the embedded micro-rotor powered movement enabled Patek to produce a remarkably thin perpetual calendar at a time when quartz watches were driving the Swiss industry out of business.

This a good opportunity to buy one of the earliest editions of the watch with a crystal back. The condition is near mint with strong proportions and clear hallmarks to the case. The watch comes with all documents, box and accessories.

Case diameter 36 mm
Thickness 8.5 mm
Movement/Caliber Cal 240Q
Base caliber Cal 240Q
Power reserve 48 h
Number of jewels 27
Frequency 21,600 A/h


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