Ron DeCorte: Patek Philippe Ref 5960 Annual Calendar Chronograph

The Ref 5960, Patek Philippe's first in-house chronograph, is generating great excitement among enthusiasts. In an exclusive review, master watchmaker Ron DeCorte gets between the plates for a detailed look at this instant classic.

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1. A side view of the case showing the Patek Philippe crest on the crown. 2 & 3. The bi-fold buckle is of 950 platinum.