No.004
Professional 1000m
diver's watch
(Analog quartz movement : 7C46)

Commercialization: in 1986

Feature:

The professional diver's watch model of 1000m saturation diving specification in deep sea diving which used first ceramic material for the case (outside case body : protector) in the world. The third generation model of the professional diver's watch after the 600m professional quartz diver's watch of [75] caliber which is made to upgrade, have 23 new technologies, such as a ceramic outside case body, a golden color hard coating case of titanium nitride (TiN), as one-piece case structure, L shaped glass gasket structure, glass screw ring fixing structure, twin side shield crown structure, special elastic strap made from polyurethane rubber.