Released in 1971, the Cal. 0747 with design code 505 was part of Seiko's domestic market collection. Powered by the 0747 caliber with 20j jewels beating at 28,800 bph, it delivers a 54 hours power reserve. [seikata-wm-fdf16f1f3f3c]
Also known as: Sportsmatic, Golden Tuna
