Patek Philippe Perpetual Calendar 3940J

Patek Philippe Reference 3940J Perpetual Calendar 3940J | 36 mm | 1991

The Patek Philippe 3940J is one of the manufacture’s most emblematic perpetual calendars, introduced in 1985 and produced until the early 2000s. Regarded as an iconic model among Patek’s grand complications, it combines discreet elegance with refined functionality and is today highly sought after by collectors. The 36 mm yellow gold case, with its slim and balanced lines, embodies Patek Philippe’s understated style. The silvered opaline dial with applied baton markers features a harmonious layout of complications: at 9 o’clock, a subdial combining the day of the week and a 24-hour indicator; at 3 o’clock, a subdial for the months and leap year cycle; while at 6 o’clock, a date ring encircles the moon phase display. Slender gold hands complete a balanced and highly legible aesthetic. At its heart lies the self-winding calibre 240 Q, based on the celebrated ultra-thin calibre 240 with an off-center micro-rotor. Finely finished and Geneva Seal-certified, it combines technical finesse with outstanding reliability. The Patek Philippe 3940J stands as a benchmark in modern watchmaking history, uniting aesthetic harmony with mechanical sophistication.