Master Ultra Thin

In Context

At 41 mm it is sized to the current mainstream: 40 mm is the median across every watch measured in this catalogue. The 7.5 mm case is genuinely slim and goes under a shirt cuff without argument. 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. 50 m covers rain and hand-washing comfortably; it is not a watch to swim in.

The movement winds itself from the motion of your wrist. 43 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.

1338421 stands on its own in this catalogue — no other reference here shares its base number. It pairs a silver sunburst dial with a stainless steel case.

Automatic movement with display for hour & minutes. Height 3.30mm; 195 components.

3 other watches in the library run the Jaeger-LeCoultre 898C.

Jaeger-LeCoultre

Master Ultra Thin Pink Gold Diamond

1352507 · 40 mm

Jaeger-LeCoultre

Rendez-Vous Ivy

3563430 · 34 mm

Jaeger-LeCoultre

Master Ultra Thin Pink Gold

1332511 · 41 mm