Seiko Cal. 3831 - 321

This Spring Drive model from 1988 features a 40mm Gold-Plated case. It features a Navy dial protected by a Acrylic crystal and offers 130m of water resistance. [seikata-wm-1176005e67eb]

Also known as: Monster, UFO

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

40mm

Case Thickness

14.6mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

130m

Dial Color

Navy

Jewels

24j

Frequency

36,000 bph

Power Reserve

57 hours

Year

1988

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