ELVIA Automatic Military Divers Watch with Sapphire Crystal and 24 Jewel Automatic Day Date Movement mug The helium escape valve allows

The helium escape valve allows these molecules to escape during decompression

it does not deteriorate with age and is non-radioactive

Crystal: Box sapphire

Black PVD stainless steel case to military contract specification

dive watches feature a "count-up" bezel designed specifically for diving

ELVIA Automatic Military Divers Watch with Sapphire Crystal and 24 Jewel Automatic Day Date Movement mug The helium escape valve allowsSKU: ELVIA SB DIV AU ELVIA first produced military specification dive watches in the 1970s for the French Marine Nationale (French Navy). This model retains the character and utilitarian design of those original issued watches while incorporating substantial modern upgrades for durability and reliability in everyday use. Among the improvements over the 1970s models are a scratch resistant sapphire crystal, a ceramic bezel insert, and significantly