Seiko Cal. 5657 - 850

This Spring Drive model from 1983 features a 38mm Hardlex-Coated Steel case. It features a White dial protected by a Hardlex crystal and offers 150m of water resistance. [seikata-wm-ca62cd31559c]

Also known as: Monster

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

38mm

Case Thickness

9.9mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

150m

Dial Color

White

Jewels

22j

Frequency

36,000 bph

Power Reserve

42 hours

Year

1983

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