Released in 1967, the Cal. 5663 with design code 905 was part of Seiko's domestic market collection. Powered by the 5663 caliber with 17j jewels beating at 28,800 bph, it delivers a 52 hours power reserve. [seikata-wm-f08db6d6f3f2]
Also known as: Silverwave, Sportsmatic
