Patek Philippe Reference 3941J - 1987 - First Series — USD 205,000

The Patek Philippe Reference 3941J is a perpetual calendar wristwatch, distinguished as a specific variant of the Reference 3940. It was introduced to accommodate clients who desired a display case back, a feature not initially available on the standard 3940 upon its launch. This reference represents a transitional period in Patek Philippe's perpetual calendar offerings, preceding the widespread availability of interchangeable case backs for the 3940 series. This timepiece is powered by the self-winding Caliber 240 Q, a thin movement featuring a micro-rotor. The case is executed in yellow gold, typically measuring 36mm in diameter. The perpetual calendar complication displays day, date, month, leap year cycle, and moon phases. The dial configuration evolved through different series, with variations in subdial markings and leap year indicator presentation. Reference 3941J is notable for its limited production, with approximately 35 examples known. Its rarity stems from its specific purpose as a display-back version of the 3940 before that option became standard. This makes it a distinct and historically interesting piece for collectors focused on the nuances of Patek Philippe's perpetual calendar lineage and production variations.