Seiko Cal. 6631 - 108

This Automatic model from 1977 features a 34mm PVD Black case. Powered by the 6631 caliber with 31j jewels beating at 28,800 bph, it delivers a 58 hours power reserve. [seikata-wm-517266b54fd4]

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

34mm

Case Thickness

9.7mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

30m

Dial Color

Champagne

Jewels

31j

Frequency

28,800 bph

Power Reserve

58 hours

Year

1977

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