Seiko Cal. 4576 - 577

The Seiko 4576-577 represents an important milestone in Seiko's 1971 lineup. Powered by the 4576 caliber with 31j jewels beating at 21,600 bph, it delivers a 37 hours power reserve. [seikata-wm-b7c02aee9417]

Also known as: Sportsmatic, Golden Tuna

Specifications

Movement

Automatic

Case Material

Titanium

Case Width

40mm

Case Thickness

9.0mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

180m

Dial Color

Cream

Jewels

31j

Frequency

21,600 bph

Power Reserve

37 hours

Year

1971

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