No.007
Professional 300m
diver's watch
(Mechanical movement : 6215)

Commercialization: in 1967

Feature:

The first diver's watch of 300m specification in Japan. The alternation of this mechanical caliber is 5 beats. There were 3 new casing technologies such as one-piece case structure, and rotating-rocking structure of glass fixing structure, and W-type screw down crown.