Seiko Cal. 7131 - 137

The Seiko 7131-137 represents an important milestone in Seiko's 1978 lineup. The Coin-Edge bezel and 36mm case give it a distinctive presence on the wrist. [seikata-wm-f738be42cab0]

Also known as: Helmet

Specifications

Movement

Quartz

Case Material

Titanium

Case Width

36mm

Case Thickness

10.5mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

160m

Dial Color

Black

Jewels

22j

Frequency

28,800 bph

Power Reserve

46 hours

Year

1978

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