Seiko Cal. 7131 - 707

This Spring Drive model from 1968 features a 37mm PVD Black case. It features a Black dial protected by a Acrylic crystal and offers 40m of water resistance. [seikata-wm-dec3eda51705]

Also known as: World Timer, Sea Horse

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

37mm

Case Thickness

14.7mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

40m

Dial Color

Black

Jewels

32j

Frequency

28,800 bph

Power Reserve

40 hours

Year

1968

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