Seiko Cal. 3831 - 581

This Automatic model from 1968 features a 40mm Stainless Steel case. It features a Champagne dial protected by a Hardlex crystal and offers 40m of water resistance. [seikata-wm-4725e408fd75]

Also known as: World Timer

Specifications

Movement

Automatic

Case Material

Stainless Steel

Case Width

40mm

Case Thickness

14.4mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

40m

Dial Color

Champagne

Jewels

21j

Frequency

36,000 bph

Power Reserve

55 hours

Year

1968

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