Seiko Cal. 5637 - 871

This Spring Drive model from 1990 features a 34mm Hardlex-Coated Steel case. The Fixed bezel and 34mm case give it a distinctive presence on the wrist. [seikata-wm-dc5b9c2e28ed]

Also known as: Helmet, World Timer

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

34mm

Case Thickness

10.1mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

150m

Dial Color

Champagne

Jewels

25j

Frequency

28,800 bph

Power Reserve

45 hours

Year

1990

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