Released in 1985, the Cal. 6185 with design code 312 was part of Seiko's domestic market collection. Powered by the 6185 caliber with 28j jewels beating at 28,800 bph, it delivers a 52 hours power reserve. [seikata-wm-7e3b7297b5a6]
Also known as: Sumo, Sportsmatic
