Seiko Prospex Black Series Mens Watch SPB253J1 1965 Recreation Black Dial Brown StrapIn 1965 Seiko introduced its, and Japan’s, first ever diver’s watch. With an automatic movement and water resistance to 150m, it proved its reliability in the harshest conditions when it was used by the Japanese Antarctic Research Expedition from 1966 to 1969. This timepiece is accompanied by Seiko’s first ever original nylon strap for diver’s watches, created in 2021 – the ‘SEICHU.” Made in Japan with a traditional texture pattern following the intricate design of Kimono belts, the strap is specifically designed for diving flexibility and durability. It also comes with an additional silicone strap.