Released in 1984, the Cal. 4534 with design code 502 was part of Seiko's domestic market collection. Powered by the 4534 caliber with 23j jewels beating at 28,800 bph, it delivers a 38 hours power reserve. [seikata-wm-b9a5e16ba6b2]
Also known as: Bullhead, Sportsmatic
