Introduced in 1985, the Patek Philippe Reference 3940 marked the manufacture's decisive return to traditional mechanical complications during the final years of the quartz era. The model paired classical perpetual calendar architecture with the newly developed ultra-thin automatic caliber 240Q and would become one of the most important modern references in the brand's history. Shortly thereafter Patek Philippe introduced the closely related Reference 3941, a discreet variation distinguished by its sapphire exhibition caseback, allowing the movement to be viewed. At the time this feature was uncommon for complicated Patek Philippe wristwatches, which were typically delivered with solid casebacks.
Like its sister reference, the 3941 is housed in a refined 36 mm case characterized by a thin polished bezel, slender case band, and elegantly tapered lugs. The proportions reflect the disciplined design philosophy of the 3940 family, emphasizing mechanical sophistication expressed through restraint and balance rather than visual excess.
Powering the watch is the manufacture caliber 240Q, an ultra-thin automatic movement incorporating a recessed 22k gold micro-rotor in order to maintain a remarkably slim profile while providing full perpetual calendar functionality. Developed from the base caliber 240 introduced in 1977, the movement was adapted for the perpetual calendar configuration in 1985 and remains one of Patek Philippe's most enduring modern calibers, combining technical complexity with exceptional thinness and refined finishing.
The dial of the present example corresponds to the earliest configuration of the 3940 family, commonly referred to by collectors as the first-series dial. Executed in ivory-toned opaline finish with applied gold baton hour markers, the dial features deeply recessed subsidiary registers with sharply defined vertical walls, producing a distinct architectural separation between the subdials and the surrounding dial surface. Later dial series introduced more gradually sloping sides to the sub-registers, softening this visual contrast, while subsequent iterations also incorporated additional graphic elements such as crosshair divisions within the leap-year and 24-hour registers. The earlier configuration seen here reflects the original design intent of the reference and is widely regarded as the most architecturally defined of the dial variants.
Produced in April 1987, the present example represents an early execution of the reference and is accompanied by its Certificate of Origin indicating retail by Beyer Chronometrie of Zurich, one of Patek Philippe's most historic retail partners. The watch is further preserved with its original box set, documentation, retailer literature, and associated accessories.
The 18k yellow gold case retains the elegant proportions characteristic of the model and displays a faint Swiss 18k gold hallmark to the case flank, consistent with examples from this early production period. The watch is fitted with a brown leather strap stamped WBLDN with contrast stitching and retains its period-correct Patek Philippe 18k yellow gold pin buckle.
Condition: Preserved in notably attractive condition, the watch retains strong case geometry, clear dial printing, and well-defined hallmarks, presenting with the refined proportions and balanced appearance for which the early 3940 family is celebrated.
