Released in 1965, the Cal. 6146 with design code 320 was part of Seiko's domestic market collection. Powered by the 6146 caliber with 32j jewels beating at 36,000 bph, it delivers a 51 hours power reserve. [seikata-wm-c0f7b65d91bd]
Also known as: Sportsmatic, Golden Tuna
