PATEK PHILIPPE YELLOW GOLD MOONPHASE POWER RESERVE, REF. 5015J

Trivia questions: what is the first so-called ‘small complication’ Patek Philippe made with a hinged case back? What early 1990s reference inspired the references 5054, the 3712, and now 5712? The answer to both questions is, of course, the ref. 5015. This reference was made in less than 3000 examples during its run from 1994 until 1999. With its elegant, hinged case back, unusual beaded bezel, and the ground-breaking 240 caliber, this is the very definition of collectability.

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