Released in 1968, the Cal. 6655 with design code 178 was part of Seiko's domestic market collection. Powered by the 6655 caliber with 35j jewels beating at 28,800 bph, it delivers a 69 hours power reserve. [seikata-wm-e81a09db5c3d]
Also known as: Sportsmatic, Golden Tuna
