Seiko Cal. 5641 - 631

This Hand-Winding model from 1974 features a 43mm Hardlex-Coated Steel case. It features a White dial protected by a Hardlex crystal and offers 70m of water resistance. [seikata-wm-046abca29a55]

Also known as: Monster

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

43mm

Case Thickness

11.3mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

70m

Dial Color

White

Jewels

27j

Frequency

28,800 bph

Power Reserve

69 hours

Year

1974

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