Seiko Cal. 6637 - 434

This Spring Drive model from 1980 features a 37mm PVD Black case. It features a Black dial protected by a Hardlex crystal and offers 80m of water resistance. [seikata-wm-19aa39329db9]

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

37mm

Case Thickness

13.0mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

80m

Dial Color

Black

Jewels

17j

Frequency

28,800 bph

Power Reserve

42 hours

Year

1980

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