Seiko Cal. 6131 - 737

This Spring Drive model from 1977 features a 40mm PVD Black case. The Coin-Edge bezel and 40mm case give it a distinctive presence on the wrist. [seikata-wm-73dad2501bae]

Also known as: Turtle

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

40mm

Case Thickness

15.7mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

40m

Dial Color

Burgundy

Jewels

25j

Frequency

36,000 bph

Power Reserve

57 hours

Year

1977

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