Released in 1979, the Cal. 4443 with design code 233 was part of Seiko's domestic market collection. Powered by the 4443 caliber with 17j jewels beating at 28,800 bph, it delivers a 44 hours power reserve. [seikata-wm-4aafd8f0acb8]
Also known as: Bellmatic, Baby Tuna
