A supremely rare and important watch, the ref. 3587 represents a true milestone in the history of Patek Philippe. The bold design incorporates one of the most technically innovative movements in the evolution of Swiss watch-making, born from a collaboration between Rolex, Patek, Omega, and IWC. This yellow gold Patek Philippe 'Beta 21' measures a substantial 43mm in diameter and is a direct descendant of the worlds first quartz movement, although the second hand runs with a super smooth sweep. Remarkably well preserved with an exceptionally clean movement, crisp blue dial and sturdy yellow gold integral bracelet.