Released in 1972, the Cal. 5239 with design code 865 was part of Seiko's domestic market collection. Powered by the 5239 caliber with 23j jewels beating at 21,600 bph, it delivers a 50 hours power reserve. [seikata-wm-7c8f8c8bf89e]
Also known as: Golden Tuna, Baby Tuna
