Patek Philippe

Perpetual calendar

Ref.3940R-001

Introduced in 1985, the Ref. 3940 is one of Patek Philippe’s signature perpetual calendar models. It is renowned as a historic masterpiece that reaffirmed the value of traditional mechanical watchmaking during the rise of quartz watches. Its slim self-winding movement houses sophisticated complications, seamlessly blending classical beauty with exceptional craftsmanship. Even today, it remains highly prized by watch enthusiasts.

Equipped with the ultra-thin self-winding Caliber 240 Q movement featuring a micro-rotor. In addition to a perpetual calendar mechanism that automatically accounts for the varying number of days in each month and leap years, it also features a moon phase display. Its sophisticated mechanism requires no manual calendar adjustment until the year 2100, provided it continues to operate properly. A true symbol of Patek Philippe’s horological mastery, this timepiece combines a complex movement with an elegant, slim case.

The elegant design features a round case crafted from 18K rose gold, paired with a sophisticated silver dial. The moon and leap year indicators are positioned at 12 o’clock, the date at 3 o’clock, the day of the week at 9 o’clock, and the moon phase and 24-hour display at 6 o’clock. Despite its complex functions, the neatly organized dial is beautifully composed, creating an elegant and refined impression complemented by the warmth of the rose gold.