Released in 1978, the Cal. 0737 with design code 656 was part of Seiko's domestic market collection. Powered by the 0737 caliber with 21j jewels beating at 28,800 bph, it delivers a 55 hours power reserve. [seikata-wm-c2d66ffa16b0]
Also known as: Sportsmatic, Golden Tuna
