These watches were specifically ordered by submarine crews for this purpose
The Concise Guide to Military Timepieces 1880-1990
Hacking Movement: Ensures accurate time synchronization
It is supplied with both a current issue grey NATO webbing strap and a black NATO strap
A built-in lock provides added security
20mm FKM (Patterned) Rubber Strap with Quick Release Feature for Fast and Easy Fitting and Removal Infantry Watches G10 100m These watches were specifically orderedFKM2 FKM, short for Fluoroelastomer, is a high performance synthetic rubber known for its exceptional density, durability, and resistance to water, chemicals, oil, and heat. Originally developed for aerospace applications, FKM was designed to meet the stringent reliability and longevity requirements of aircraft and space missions. These qualities make FKM straps highly favored by military personnel, police officers, and professional divers, as they