Seiko Cal. 6131 - 668

This Spring Drive model from 1980 features a 35mm Titanium case. It features a Cream dial protected by a Hardlex crystal and offers 170m of water resistance. [seikata-wm-ae1f667bf9ef]

Also known as: Tuna, Helmet

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

35mm

Case Thickness

10.9mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

170m

Dial Color

Cream

Jewels

20j

Frequency

21,600 bph

Power Reserve

37 hours

Year

1980

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