Released in 1978, the Cal. 3856 with design code 755 was part of Seiko's domestic market collection. Powered by the 3856 caliber with 28j jewels beating at 21,600 bph, it delivers a 57 hours power reserve. [seikata-wm-9d60e4b9bfb5]
Also known as: Tuna, Baby Tuna
