Released in 1976, the Cal. 7139 with design code 193 was part of Seiko's domestic market collection. Powered by the 7139 caliber with 27j jewels beating at 21,600 bph, it delivers a 51 hours power reserve. [seikata-wm-f16f2821d2d1]
Also known as: Sportsmatic, Baby Tuna
