Patek Philippe Annual Calendar

Annual Calendar is a wristwatch by Patek Philippe.

First mechanical wristwatch with patented annual calendar. Overall, the self-winding movement Calibre 315 QA and the display of date, day of the week and month requires more components than the known Patek Philippe Calibre 240Q with perpetual calendar: 316 instead of 275. The mechanism is programmed so that it takes account of the different month lengths from 1 March to the end of February. Only then a small correction is necessary.

Movement: Self-winding movement Calibre 315 QA, 21,600 A/h Unidirectional winding central rotor in 21ct gold 36 jewels Power reserve bis 48 hours Case: 18ct red gold Ø 37 mm, height 11.2 mm Sapphire crystal Screwed sapphire crystal caseback Waterproof to 25 m Dial: Gold dial, ceramic white Superimposed Roman numerals and red gold hands with luminous material Functions: Hours, minutes, central seconds, date 24-hours indication Annual calendar Bracelet: Brown crocodile leather strap with folding clasp