Seiko - The History of Seiko Diver's Watches -Japan's first diver's watch Japan's first diver's watch was an automatic 150m Diver's. The launch of this model marked the start of Seiko's pursuit
A Look at Seiko's Early Divers
Seiko Mens Seiko Prospex First Japanese Divers Re-Interpretation Watch SPB239J1 - Est. 1888 – thbaker.co.uk