Seiko Cal. 6131 - 936

This Spring Drive model from 1966 features a 40mm PVD Black case. The Rotating bezel and 40mm case give it a distinctive presence on the wrist. [seikata-wm-7bbd6839ee8f]

Also known as: Turtle

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

40mm

Case Thickness

9.5mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

130m

Dial Color

Black

Jewels

34j

Frequency

36,000 bph

Power Reserve

61 hours

Year

1966

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