Released in 1978, the Cal. 5275 with design code 136 was part of Seiko's domestic market collection. Powered by the 5275 caliber with 23j jewels beating at 36,000 bph, it delivers a 72 hours power reserve. [seikata-wm-d8d4fac3a8cc]
Also known as: Sportsmatic, Golden Tuna
