Released in 1997, the Cal. 4431 with design code 668 was part of Seiko's domestic market collection. Powered by the 4431 caliber with 25j jewels beating at 21,600 bph, it delivers a 60 hours power reserve. [seikata-wm-8d28f8d1f0cd]
Also known as: Silverwave, Goldfeather
