Released in 1986, the Cal. 5263 with design code 418 was part of Seiko's domestic market collection. Powered by the 5263 caliber with 18j jewels beating at 21,600 bph, it delivers a 62 hours power reserve. [seikata-wm-f7d3d4594c5c]
Also known as: Tuna, Baby Tuna
