Perpetual Calendar 6159 White Gold / Silver

In Context

At 39.5 mm it sits just under the modern norm — the band that suits the widest spread of wrists. At 11.49 mm thick it is about average for a modern wristwatch. The case back is open, so the movement is visible without taking the watch apart, and the sapphire crystal will resist everything short of deliberate abuse. Rated to 30 m, it is protected against rain and splashes and nothing beyond that.

The movement winds itself from the motion of your wrist. 45 hours of reserve carries it overnight, but not through a weekend in a drawer. At 28,800 vph the seconds hand advances 8 times a second.

6159G-001 stands on its own in this catalogue — no other reference here shares its base number. It pairs a grey dial with a white gold case. Beyond the time it carries a perpetual calendar.

The 26-300 automatic base with a retrograde perpetual calendar module above it, made for reference 6159. The date runs along an arc between eight and four o'clock and snaps back to the first at midnight on the 30th or 31st, which is the mechanically demanding part of the arrangement. The base itself descends from the 315 and 324 workhorses.

1 other watch in the library runs the Patek Philippe 26-330 S QR.

Patek Philippe

Perpetual Calendar 5160

5160/500R-001 · 38 mm