Master Control Date Stainless Steel / Silver

In Context

At 40 mm it is sized to the current mainstream: 40 mm is the median across every watch measured in this catalogue. At 8.78 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. 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. 70 hours of reserve is enough to set it down on Friday evening and find it still running on Monday. At 28,800 vph the seconds hand advances 8 times a second.

Q4018421 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.

Caliber 899AC was introduced in 2020 as an updated version of caliber 899 (/1). This new version offers a 70 hours power reserve which is achieved through optimizing the performance, notably through a new barrel design, new forms of lubrication, a new adjustment of the second hand, and a the silicon escapement (a first) which significantly reduces friction.

2 other watches in the library run the Jaeger-LeCoultre 899AC.

Jaeger-LeCoultre

Master Control Date Stainless Steel / Silver / Novonappa

4018420 · 40 mm

Jaeger-LeCoultre

Master Control Date Stainless Steel / Blue

4018480 · 40 mm