Patek Philippe Perpetual Calendar Calatrava 18K Yellow Gold Second Series Ref. 3940J circa 1992

Patek Philippe Perpetual Calendar Calatrava 18K Yellow Gold Second Series Ref. 3940J circa 1992Patek Philippe Perpetual Calendar Calatrava Ref. 3940J 18K Yellow Gold Second Series Widely regarded as one of the most important perpetual calendars ever produced, the Patek Philippe Ref. 3940J represents the golden age of modern Patek Philippe watchmaking. Elegant, discreet, and technically exceptional, the 3940 is often considered the last perpetual calendar to fully embody the artisanal spirit and refined proportions of traditional Geneva

Patek Philippe Perpetual Calendar Calatrava Ref. 3940J – 18K Yellow Gold – Second Series

Widely regarded as one of the most important perpetual calendars ever produced, the Patek Philippe Ref. 3940J represents the golden age of modern Patek Philippe watchmaking. Elegant, discreet, and technically exceptional, the 3940 is often considered the last perpetual calendar to fully embody the artisanal spirit and refined proportions of traditional Geneva watchmaking before the era of larger contemporary complications.

Presented here is a beautiful second-series example dating to circa 1991–1992, crafted in solid 18k yellow gold and preserved in outstanding condition.

The perfectly balanced dial displays the complete perpetual calendar indications with day, date, month, moonphase, and leap year display. This particular example features the desirable German-language day and month discs, adding further charm and individuality for collectors. The dial remains in perfect condition, showcasing the clarity and elegance that have made the 3940 one of the most admired complicated wristwatches ever created.

At its heart beats the legendary Patek Philippe Calibre 240Q, an ultra-thin automatic perpetual calendar movement powered by a 22k gold micro-rotor. Celebrated for its elegance, reliability, and exceptional finishing, the Calibre 240Q remains one of the most beautiful perpetual calendar movements ever produced.

The sapphire display caseback allows full appreciation of the movement's exquisite architecture and finishing, offering a direct view of one of Patek Philippe's most iconic calibres.

The watch is fitted with a handmade brown leather strap crafted in Belgium and paired with an original Patek Philippe 18k yellow gold deployant buckle, completing a highly desirable and elegant presentation.

An Extract from the Archives has been requested from Patek Philippe and is expected to arrive at the end of August, further enhancing the watch's provenance and collectibility.

Key highlights:

Reference 3940J

Second Series example

Solid 18k yellow gold case

Patek Philippe Cal. 240Q automatic perpetual calendar

Ultra-thin movement with 22k gold micro-rotor

Perpetual calendar with day, date, month, moonphase and leap year indication

German-language day and month discs

Perfect original dial

Sapphire display caseback

Original Patek Philippe signed crown

Sapphire crystal

Original Patek Philippe 18k yellow gold deployant buckle

Handmade Belgian brown leather strap

Extract from the Archives requested from Patek Philippe

Circa 1991–1992

The Ref. 3940 is widely considered one of the greatest perpetual calendars ever made—a masterpiece of restraint, proportion, and mechanical sophistication. Elegant enough for daily wear yet important enough for the most serious collections, it remains a cornerstone reference in the history of Patek Philippe and modern haute horlogerie.