Released in 1987, the Cal. 4589 with design code 439 was part of Seiko's domestic market collection. Powered by the 4589 caliber with 35j jewels beating at 21,600 bph, it delivers a 67 hours power reserve. [seikata-wm-c2b1e58a52a2]
Also known as: Sumo, Golden Tuna
