Released in 1973, the Cal. 4446 with design code 682 was part of Seiko's domestic market collection. Powered by the 4446 caliber with 22j jewels beating at 36,000 bph, it delivers a 70 hours power reserve. [seikata-wm-0d34e7a9eeac]
Also known as: Sumo, Sportsmatic
