Geophysic Universal Time Stainless Steel / Bracelet

In Context

At 41.6 mm it is sized to the current mainstream: 40 mm is the median across every watch measured in this catalogue. At 11.84 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. 40 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.

8108120 stands on its own in this catalogue — no other reference here shares its base number. It pairs a blue dial with a stainless steel case. Introduced in 2015.

Introduced in 2015 in the Geophysic, caliber 772 features a dead-beat seconds and a worldtime function. From a technical perspective, one of the most notable features of caliber 770 and 772 is the atypical balance wheel featuring a non-circular configuration that required lengthy research in order to reduce air resistance. Named the Gyrolab®, this device was initially developed in a laboratory version back in 2007 to equip the Master Compressor Extreme Lab 1 watch. It took eight years to transition from the confidential version to one that could be incorporated into an entire watch line. Geophysic® is the first collection to enjoy the full benefits of this key breakthrough and its determining influence on the precision of the watch. This precision is also expressed by the true seconds system that causes the seconds hand to move forwards while "beating the second", meaning by performing a jump every second. This is no ordinary feat for a mechanical movement, and one that does not disturb the smooth running of the watch. The true seconds mechanism involves an extremely sophisticated construction whose effectiveness is expressed on the dial by a pleasantly rhythmical reading of the seconds. This specific expertise, which has been mastered by Jaeger-LeCoultre since the 19th century, testifies to the authentic instrument-worthy nature of the Geophysic.

2 other watches in the library run the Jaeger-LeCoultre 772.

Jaeger-LeCoultre

Geophysic Universal Time Stainless Steel

8108420 · 41.6 mm

Jaeger-LeCoultre

Geophysic Universal Time Pink Gold

8102520 · 41.6 mm