Seiko Cal. 5231 - 290

This Spring Drive model from 1976 features a 42mm Titanium case. It features a Burgundy dial protected by a Sapphire crystal and offers 30m of water resistance. [seikata-wm-ca28e759bf2e]

Also known as: Monster

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

42mm

Case Thickness

12.5mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

30m

Dial Color

Burgundy

Jewels

27j

Frequency

36,000 bph

Power Reserve

55 hours

Year

1976

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