Patek Philippe
Perpetual Calendar Ref. 3940R-018
Ref. 3940R-018
The Patek Philippe Ref. 3940R-018 is a highly collectible perpetual calendar watch featuring a 36mm rose gold case and an automatic Calibre 240Q movement. Introduced during the Quartz Crisis, it exemplifies Patek Philippe's commitment to high horology with its slim profile, elegant design, and complex perpetual calendar complication, including moon phase, day, date, and leap year functions.
braceletBrown Alligator Leather Strap with 18K Rose Gold Deployant Buckle
movementAutomatic Calibre 240Q, perpetual calendar, 2.53mm thickness, ~48-hour power reserve
functionsPerpetual calendar (day, date, month, leap year), moon phase
dial colorWhite
case diameter36mm
case material18K Rose Gold
year1985–2006
A registered Patek Philippe 3940R-018 carries a permanent RGATT passport: origin, history and owners, verifiable by anyone, and a documented history makes a watch easier to sell.