Seiko Cal. 6131 - 438

The Seiko 6131-438 represents an important milestone in Seiko's 1976 lineup. It features a Cream dial protected by a Hardlex crystal and offers 150m of water resistance. [seikata-wm-09b159e2f393]

Also known as: Helmet

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

46mm

Case Thickness

10.6mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

150m

Dial Color

Cream

Jewels

32j

Frequency

36,000 bph

Power Reserve

58 hours

Year

1976

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