Released in 1976, the Cal. 4548 with design code 820 was part of Seiko's domestic market collection. Powered by the 4548 caliber with 33j jewels beating at 28,800 bph, it delivers a 37 hours power reserve. [seikata-wm-6183f0b7dde6]
Also known as: Golden Tuna, Baby Tuna
