Seiko Cal. 6631 - 371

This Kinetic model from 1979 features a 41mm Two-Tone case. It features a Black dial protected by a Hardlex crystal and offers 100m of water resistance. [seikata-wm-8e4bd040e6fa]

Specifications

Movement

Kinetic

Case Material

Two-Tone

Case Width

41mm

Case Thickness

12.9mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

100m

Dial Color

Black

Jewels

20j

Frequency

36,000 bph

Power Reserve

41 hours

Year

1979

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