Seiko Cal. 0731 - 305

This Spring Drive model from 1966 features a 44mm Hardlex-Coated Steel case. The Fixed bezel and 44mm case give it a distinctive presence on the wrist. [seikata-wm-e409aa2f0b36]

Also known as: World Timer, Emperor

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

44mm

Case Thickness

12.0mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

190m

Dial Color

Cream

Jewels

34j

Frequency

21,600 bph

Power Reserve

45 hours

Year

1966

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