27 Patek Philippe A rare and attractive, Perpetual Calendar, moon phases, leap year, 24-hour indication, wristwatch in yellow gold, reference 3940

Estimate: CHF 30,000 –⁠ 60,000

The Patek Philippe reference 3940 holds a special place in the hearts of collectors, having cemented its legacy as one of the most beloved and influential references in modern horology. Launched in 1985 and produced until 2007, the reference 3940 epitomized Patek Philippe's commitment to combining elegance, complication, and simplicity in a remarkably slender case. Measuring just 9 mm thick, it was powered by the ultra-thin caliber 240-Q movement, featuring a 22k gold micro-rotor, a marvel of engineering that set a new standard for slim, complicated wristwatches. What makes this particular example so desirable is that it represents a third series of the reference, identifiable by the distinctive cross-hair pattern on the sub-dial at 3 o'clock— a detail cherished by collectors. Crafted in yellow gold, this example has been preserved in remarkable condition, with nice edges, and a great dial that retains the timeless beauty this model is known for. The reference 3940 holds historical significance as well, having been the personal choice of Philippe Stern, the then president of Patek Philippe, as his everyday wristwatch. This connection, along with the watch’s intrinsic qualities, makes it a coveted piece, especially when it comes with such an elegant, refined aesthetic. With its perpetual calendar and sophisticated movement, the 3940 represents an exceptional example of Patek Philippe’s horological mastery, offering both timeless style and remarkable technical innovation.