Patek Philippe 5270P-001 (Pre-Owned)A true grail from arguably the most important name in watchmaking is this Patek Philippe 5270P 001 with salmon dial. Through the caseback we are given view of Patek's CH 29535 PS Q caliber which serves as the engine for the time, a chronograph with instantaneous 30 minute counter, and Perpetual Calendar with moonphase complication. One of my favorite aspects of this watch which can sometimes be overlooked by beauty of the dial and movement is the