Patek Philippe reference 3445. This reference is launched in 1960-1961 and remained in production until the early-1980s. It’s the first “simple” calendar wristwatch made by Patek Philippe. The majority in yellow gold, more rarely in rose gold, even more rarely in white gold or platinum. According to our research, only ten examples of the Ref. 3445 in platinum are known to have appeared on the open market, three of these have diamond-set dials. This present nice example was completed the services in Patek Philippe invoice date Dec 14, 2021, which with 24-month repair guarantee from the date of invoicing. Please note that in the Patek Philippe Archives in Geneva, the movement and case numbers of this watch do not match each other, it’s therefore impossible to receive today an Extract from the Archives