Patek Philippe Annual Calendar 5035P Black Dial in Platinum with BoxPatek Philippe revolutionized horology in 1996 by introducing the Annual Calendar with Ref. 5035, a patented useful complication that requires adjustment only once a year in February. Designed as a more accessible alternative to the intricate perpetual calendar, this innovation quickly became a cornerstone of the brands collection and has since appeared in numerous, diverse designs. We currently have a Ref. 5035P the P denoting a platinum case. This