J-001 Moonphase 7121 Yellow Gold / Cream

In Context

At 33 mm it is small by current standards, in the range most wristwatches occupied before cases began growing through the 1990s. At 8.35 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 is hand-wound, so winding it becomes part of the day rather than something the watch does for you. 44 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.

7121 stands on its own in this catalogue — no other reference here shares its base number. It pairs a beige matte dial with a yellow gold case. Beyond the time it carries a moon phase.

Classic Patek Philippe hand-wound movement with small seconds. Gyromax balance. Hallmarked with the Patek Philippe seal.

7 other watches in the library run the Patek Philippe 215 PS LU.

Patek Philippe

Moonphase 7121 Yellow Gold / Cream / Bracelet

7121/1J-001 · 33 mm

Patek Philippe

Moonphase 4968 Rose Gold / White Mother of Pearl

4968R-001 · 33.3 mm

Patek Philippe

Moonphase 7121 White Gold - Diamond / Grey / Tokyo 2023

7121/200G-010 · 33 mm

Patek Philippe

Moonphase 4968 Rose Gold / Diamond Spiral

4968/400R-001 · 33.3 mm