Patek Philippe Perpetual Calendar 3940P Platinum Silver Dial

The Patek Philippe ref. 3940P-011 is one of the best-known perpetual calendars of the modern Patek era. This platinum example, produced circa 2005, is a third-series watch with the reference's restrained 36 mm case and a silver dial that gives the calendar display its familiar, compact symmetry. Powering the watch is the self-winding caliber 240 Q, Patek Philippe's ultra-thin micro-rotor perpetual calendar movement. That movement is central to the appeal of the 3940. It allowed Patek Philippe to build an automatic perpetual calendar that remained slim, balanced on the wrist, and mechanically sophisticated without feeling oversized or heavy. The display includes day, date, month, moonphase, 24-hour indication, and leap year. On the 3940, that layout is instantly recognizable, and for many collectors it remains one of Patek Philippe's clearest and most successful perpetual calendar dials. In platinum, the 3940 carries a more understated look than the yellow gold versions. That quieter execution has long appealed to collectors who want the reference in its most discreet form. The ref. 3940 was produced from the mid-1980s until it was replaced by the ref. 5140. Over that run, it became one of Patek Philippe's defining serially produced perpetual calendars. Within the reference, the 3940P-011 holds a particularly attractive position: a later silver-dial platinum variant from the model's mature period, pairing the proven caliber 240 Q with the clean proportions and sober presentation that make the 3940 so enduring. This particular example is in outstanding full set condition and was just completely serviced by Patek Philippe in 2026