Seiko Cal. 6331 - 934

This Automatic model from 1979 features a 37mm Hardlex-Coated Steel case. The Fixed bezel and 37mm case give it a distinctive presence on the wrist. [seikata-wm-7920ec7380ba]

Also known as: Bullhead, Helmet

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

37mm

Case Thickness

9.8mm

Lug Width

19mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

190m

Dial Color

Silver

Jewels

30j

Frequency

28,800 bph

Power Reserve

45 hours

Year

1979

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