Patek Philippe Perpetual Calendar 3940G Silver Dial

Opening Context
The reference 3940 occupies an important place in modern Patek Philippe history. Introduced in 1985 as the successor to the reference 3450, it reworked the Maison’s automatic perpetual calendar into a slimmer, more restrained 36 mm format powered by the micro-rotor Calibre 240 Q. The reference would remain in production until approximately 2007, becoming one of Patek Philippe’s longest-running modern complications.
In white gold, the 3940G takes on an especially understated character. The silver opaline dial and applied white gold baton markers keep the watch almost monochromatic, allowing the calendar architecture and moonphase to provide the visual interest rather than the case metal itself.

Why This Reference Matters
The 3940 is respected because it manages to communicate a considerable amount of information without losing the elegance of a traditional dress watch. Three subsidiary displays indicate the day, date, month, leap-year cycle, 24-hour indication and moonphase, yet the dial remains balanced and remarkably compact.
Inside is the automatic Calibre 240 Q, built around Patek Philippe’s ultra-thin 240 architecture and its integrated 22K gold micro-rotor. The movement allowed the complete perpetual calendar mechanism to sit within an unusually slim case while offering approximately 48 hours of power reserve.
That combination of mechanical complexity and physical restraint is central to why the 3940 has become such an important reference among collectors.

On the Wrist
At 36 mm, the 3940G wears with genuinely classical proportions. The case sits close to the wrist, while the relatively open dial and three-subdial arrangement give it more presence than its diameter alone might suggest. It feels elegant rather than small, particularly when viewed in the context of the era in which it was designed.
White gold reinforces the discretion. Unlike yellow or rose gold, it does not immediately announce itself as a precious-metal watch, and the silver opaline dial creates a quiet, almost tonal appearance. On a black leather strap with white gold pin buckle, the overall effect is formal, restrained and unmistakably Patek Philippe.

Condition & Transparency
This example is presented on a black leather strap with an 18K white gold pin buckle. Specific information regarding case condition, polishing history, dial and hand condition, crystal, strap condition, box and papers, series or production period, and previous servicing has not been provided. These details should therefore not be assumed. Given the perpetual calendar mechanism, confirmed service history and correct operation of all calendar indications are particularly relevant when assessing an individual example.

Why It Belongs in a Collection
The 3940G suits a collector who values complication without visual excess. It represents a period when Patek Philippe was able to make one of traditional watchmaking’s most demanding calendar mechanisms feel almost effortless, placing it inside a case that remains slimmer and smaller than many contemporary time-only watches.
Within a broader collection, the white gold version offers an especially discreet interpretation of the reference. It carries the mechanical depth of a perpetual calendar without the immediate visual presence of yellow or rose gold, making its significance something that tends to reveal itself through familiarity rather than first impression.

Closing
The Patek Philippe Perpetual Calendar 3940G is one of those watches whose importance becomes clearer the longer one spends with it. A 36 mm white gold case, balanced perpetual calendar display, moonphase and ultra-thin Calibre 240 Q come together with very little excess. It is complicated watchmaking expressed with the restraint that has made the 3940 one of the defining Patek Philippe references of its era.

Specifications

• Case Size: 36 mm
  
• Material: 18K White Gold
  
• Dial: Silver Opaline Dial with Perpetual Calendar Subdials, Moonphase and Applied White Gold Baton Hour Markers
  
• Strap: Black Leather Strap with 18K White Gold Pin Buckle
  
• Power Reserve: 48 Hours
  
• Movement: Automatic (Calibre 240 Q)

Shipments are delivered under Delivered Duty Unpaid (DDU) terms, with duties and taxes payable by the recipient.