Seiko Cal. 3831 - 331

This Spring Drive model from 1986 features a 43mm Two-Tone case. It features a Black dial protected by a Mineral crystal and offers 100m of water resistance. [seikata-wm-aef2a7543a40]

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

43mm

Case Thickness

10.7mm

Lug Width

20mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

100m

Dial Color

Black

Jewels

28j

Frequency

21,600 bph

Power Reserve

61 hours

Year

1986

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