Seiko Cal. 6631 - 674

This Spring Drive model from 1974 features a 45mm Hardlex-Coated Steel case. It features a White dial protected by a Hardlex crystal and offers 60m of water resistance. [seikata-wm-5cf22d038ded]

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

45mm

Case Thickness

14.5mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

60m

Dial Color

White

Jewels

35j

Frequency

21,600 bph

Power Reserve

46 hours

Year

1974

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