Seiko Cal. 4576 - 977

Seiko 4576-977

The 4576-977 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 4576 caliber with 21j jewels beating at 21,600 bph, it delivers a 50 hours power reserve. [seikata-wm-346d288612b9]

Also known as: Tuna, UFO

Specifications

Movement
Spring Drive
Case Material
Stainless Steel
Case Width
36mm
Case Thickness
13.5mm
Lug Width
19mm
Crystal
Acrylic
Bezel
Inner Rotating
Water Resistance
160m
Dial Color
Cream
Jewels
21j
Frequency
21,600 bph
Power Reserve
50 hours
Year
1980

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seikata-wm-346d288612b9