Seiko Cal. 5657 - 777

This Automatic model from 1981 features a 41mm PVD Black case. Powered by the 5657 caliber with 33j jewels beating at 21,600 bph, it delivers a 48 hours power reserve. [seikata-wm-68dc420c85cf]

Also known as: Baby Tuna

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

41mm

Case Thickness

11.3mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

90m

Dial Color

Black

Jewels

33j

Frequency

21,600 bph

Power Reserve

48 hours

Year

1981

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