Released in 1965, the Cal. 4440 with design code 424 was part of Seiko's domestic market collection. Powered by the 4440 caliber with 25j jewels beating at 36,000 bph, it delivers a 40 hours power reserve. [seikata-wm-af4f16d0fa7b]
Also known as: Sportsmatic, Baby Tuna
