Seiko Cal. 4431 - 851

This Quartz model from 1967 features a 43mm PVD Black case. It features a White dial protected by a Hardlex crystal and offers 180m of water resistance. [seikata-wm-171afa7e3514]

Also known as: Helmet, Emperor

Specifications

Movement

Quartz

Case Material

PVD Black

Case Width

43mm

Case Thickness

12.2mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

180m

Dial Color

White

Jewels

35j

Frequency

21,600 bph

Power Reserve

67 hours

Year

1967

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