Released in 1965, the Cal. 3869 with design code 363 was part of Seiko's domestic market collection. Powered by the 3869 caliber with 33j jewels beating at 28,800 bph, it delivers a 59 hours power reserve. [seikata-wm-4e4f6ee4e8e4]
Also known as: Sumo, Baby Tuna
