The birth of the professional diver's watch
It all began with a letter from Hiroshima. The correspondent, a professional diver, explained that no watch could withstand the stresses and strains he experienced when working at depths greater than 300m. Inspired, Seiko engineers got down to work. Years of research development paid off in 1975 with the introduction of the world's first titanium cased diver's watch: the Professional Diver's 600m.
A mere three years later, the Professional Diver's 600m was upgraded with the 7549 caliber, transforming it into the world's first saturation diving watch with a quartz movement. In 1983, to test its reliability, the watch was strapped to the research submarine "SHINKAI 2000" and taken to a depth of 1,062 meters below sea level, nearly twice as deep as its specified maximum. It performed with perfect accuracy.
Reviving a legendary design with enhanced technical specifications
To commemorate the 40th anniversary of Seiko's invention of
the world's first professional quartz diver's watch, this landmark timepiece is
faithfully recreated in design but re-invented with Seiko's latest technology and materials.