Released in 1987, the Cal. 6371 with design code 538 was part of Seiko's domestic market collection. Powered by the 6371 caliber with 34j jewels beating at 28,800 bph, it delivers a 58 hours power reserve. [seikata-wm-5e9ef9b4a9d8]
Also known as: Bullhead, Golden Tuna
