Patek Philippe Perpetual Calendar 5940J-001 Silvery Opaline Dial

Opening Context
The reference 5940 brings Patek Philippe’s perpetual calendar into one of the Maison’s more unusual shaped cases. Rather than using the familiar round format associated with references such as the 3940, the 5940 adopts a softly squared cushion case, giving the complication a distinctly more architectural presence while preserving the elegance expected of a traditional Patek Philippe calendar watch.
In 18K yellow gold with a silvery opaline dial, the 5940J-001 feels warm and classical, but the case shape gives it a character quite separate from the Maison’s more conventional perpetual calendars.

Why This Reference Matters
The strength of the 5940J lies in the contrast between its unusual form and very traditional dial language. Applied yellow gold Breguet numerals give the silvery opaline dial a refined, almost vintage quality, while the perpetual calendar displays are arranged to show the day, date, month, leap-year cycle, 24-hour indication and moonphase without overwhelming the composition.
Inside is the automatic Calibre 240 Q, built around Patek Philippe’s ultra-thin micro-rotor architecture. With approximately 48 hours of power reserve, the movement allows the full perpetual calendar mechanism to remain remarkably slim despite the amount of information it carries. The calibre is central to the reference’s appeal, combining serious complication with understated proportions.

On the Wrist
At approximately 37 x 44.6 mm, the 5940J wears very differently from a round watch of similar width. The cushion case gives it more visual presence across the wrist, while the relatively slim profile keeps the watch elegant rather than bulky.
Yellow gold adds warmth and a sense of traditional luxury, while the silvery opaline dial keeps the overall appearance light and balanced. The Breguet numerals bring additional character without making the watch feel ornate. On a brown leather strap with yellow gold tang buckle, the watch has a formal but highly individual presence.

Condition & Transparency
This example is presented on a brown leather strap with an 18K yellow gold tang buckle. Specific information regarding case condition, polishing history, dial and hand condition, crystal, strap condition, box and papers, and previous servicing has not been provided. These details should therefore not be assumed. Given the perpetual calendar mechanism, correct operation of all calendar indications and the moonphase should be confirmed when assessing the individual watch.

Why It Belongs in a Collection
The 5940J-001 suits a collector who appreciates Patek Philippe complications but wants something less expected than a traditional round perpetual calendar. The cushion case gives the watch a strong identity, while the Breguet numerals and micro-rotor Calibre 240 Q preserve the sense of classical Geneva watchmaking.
Within a broader collection, it offers a useful bridge between shaped Patek Philippe references and the Maison’s high complications. It is mechanically serious, visually distinctive and still restrained enough to wear as a traditional dress watch.

Closing
The Patek Philippe Perpetual Calendar 5940J-001 is a particularly elegant expression of the Maison’s shaped-watch tradition. Its yellow gold cushion case, silvery opaline dial, Breguet numerals and micro-rotor Calibre 240 Q give it both mechanical depth and a clear visual identity. It is a perpetual calendar with real character, expressed in a form that feels unmistakably Patek Philippe without following the usual round formula.

Specifications

• Case Size: 37 mm x 44.6 mm
  
• Material: 18K Yellow Gold
  
• Dial: Silvery Opaline Dial with Applied Yellow Gold Breguet Numerals, Day, Date, Month, Leap-Year Indicator, 24-Hour Indicator and Moonphase Display
  
• Strap: Brown Leather Strap with 18K Yellow Gold Tang Buckle
  
• Power Reserve: 48 Hours
  
• Movement: Automatic (Calibre 240 Q, Micro-Rotor)

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