Patek Philippe 3940J Perpetual Calendar 3940J 18K Yellow Gold EARLY MODEL FULL SET (33937)

33937 Patek Philippe 3940 J Perpetual Calendar, 3940J, this is a very early yellow gold 3940 model sold new in 1988. 18k yellow gold case on a strap with an 18k yellow gold tang buckle (deployment buckle available for $2000 exchange) automatic perpetual calendar (English) with, day, date, month, moonphase, 24-hour indicator, leap year indicator, applied gold index numerals, silver dial, sapphire crystal with display caseback, water resistant, diameter: 36mm, thickness: 9mm. Like New with original winding box and warranty certificate dated February of 1988. This watch also comes with an additional solid case back which would have been specially requested by the original owner.


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More about Patek Philippe 3940J Perpetual Calendar 3940J 18K Yellow Gold EARLY MODEL FULL SET

This is a 1988 18K yellow gold Patek Philippe Perpetual Calendar 3940J. The solid, round, polished case has a stepped bezel with straight lugs. The month and leap year are displayed on a sub dial at 3 o'clock. The date and moon phase sub dial is at 6 o'clock, with the day and 24-hour time at 9. It has a matte silver dial with applied yellow gold hands and baton hour markers, and exterior dot minute indexes. It has a 46-hour power reserve and it's water resistant to 25m. The case, dial, and movement are all signed.

This Patek Philippe Perpetual Calendar 3940J has a mechanical automatic caliber 240-Q movement that's rhodium-plated with fausses cotes decoration, and it has the Seal of Geneva quality stamp. It's constructed with 27 jewels, 275 parts, and a lateral lever escapement with three arms under a polished steel bridge. It has a 22K winding rotor and the patented Patek Philippe gyromax balance that adjusts for cold, heat, isochronism and 5 positions. It includes a shock absorber mechanism, and a self-compensating free-sprung Breguet balance spring. The mechanism oscillates at a frequency of 21,600 vph (3 Hz).

Patek Philippe made the very first perpetual calendar wristwatch in 1925. It's an incredible calendar innovation that self-adjusts for the months that have only 28 or 30 days, as well as for leap years. This Patek Philippe Perpetual Calendar 3940J was introduced in 1985 and was discontinued in 2006.