Seiko Cal. 5671 - 687

This Spring Drive model from 1974 features a 38mm Hardlex-Coated Steel case. The Bidirectional bezel and 38mm case give it a distinctive presence on the wrist. [seikata-wm-00e339b2c2ab]

Also known as: Bullhead, Silverwave

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

38mm

Case Thickness

11.1mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

150m

Dial Color

Black

Jewels

18j

Frequency

28,800 bph

Power Reserve

67 hours

Year

1974

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