Released in 1981, the Cal. 3854 with design code 355 was part of Seiko's domestic market collection. Powered by the 3854 caliber with 23j jewels beating at 21,600 bph, it delivers a 43 hours power reserve. [seikata-wm-8f0d8e4a2caa]
Also known as: Sumo, Sportsmatic
