Released in 1967, the Cal. 5239 with design code 873 was part of Seiko's domestic market collection. Powered by the 5239 caliber with 31j jewels beating at 36,000 bph, it delivers a 56 hours power reserve. [seikata-wm-c4d0d15e4ffc]
Also known as: Bullhead, Baby Tuna
