Released in 1993, the Cal. 6310 with design code 327 was part of Seiko's domestic market collection. Powered by the 6310 caliber with 32j jewels beating at 21,600 bph, it delivers a 63 hours power reserve. [seikata-wm-3a3c6b34e8b5]
Also known as: Tuna, Flighty
