Released in 1976, the Cal. 5289 with design code 741 was part of Seiko's domestic market collection. Powered by the 5289 caliber with 27j jewels beating at 36,000 bph, it delivers a 40 hours power reserve. [seikata-wm-0b58bf1a7e7a]
Also known as: Sumo, Baby Tuna
