Seiko Cal. 6331 - 672

This Quartz model from 1978 features a 43mm Stainless Steel case. It features a Green dial protected by a Hardlex crystal and offers 150m of water resistance. [seikata-wm-c66650a204c5]

Also known as: Sportsmatic

Specifications

Movement

Quartz

Case Material

Stainless Steel

Case Width

43mm

Case Thickness

9.2mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

150m

Dial Color

Green

Jewels

31j

Frequency

21,600 bph

Power Reserve

45 hours

Year

1978

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