Released in 1970, the Cal. 6618 with design code 517 was part of Seiko's domestic market collection. Powered by the 6618 caliber with 28j jewels beating at 36,000 bph, it delivers a 71 hours power reserve. [seikata-wm-fd8e4d3fb07a]
Also known as: Goldfeather, Golden Tuna
