Master Control Calendar Stainless Steel / Blue

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 10.95 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.

4148480 stands on its own in this catalogue — no other reference here shares its base number. It pairs a blue sunburst dial with a stainless steel case. It was a limited edition. Introduced in 2022.

Caliber 866AA was introduced in 2020 as an updated version of caliber 866 (/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 which significantly reduces friction.

5 other watches in the library run the Jaeger-LeCoultre 866AA.

Jaeger-LeCoultre

Master Control Calendar Pink Gold / Silver / Alligator

Q4142520 · 40 mm

Jaeger-LeCoultre

Master Control Calendar Stainless Steel / Silver Sector

Q4148450 · 40 mm

Jaeger-LeCoultre

Master Control Calendar Stainless Steel / Silver

Q4148421 · 40 mm

Jaeger-LeCoultre

Master Control Calendar Stainless Steel / Silver / Bracelet

Q4148120 · 40 mm