Released in 1979, the Cal. 5279 with design code 670 was part of Seiko's domestic market collection. Powered by the 5279 caliber with 32j jewels beating at 36,000 bph, it delivers a 67 hours power reserve. [seikata-wm-8e71c6d7ddf3]
Also known as: Sumo, Baby Tuna
