Released in 1965, the Cal. 3813 with design code 203 was part of Seiko's domestic market collection. Powered by the 3813 caliber with 32j jewels beating at 36,000 bph, it delivers a 45 hours power reserve. [seikata-wm-9edc9ed9b5c6]
Also known as: Samurai, Golden Tuna
