Seiko Cal. 7131 - 624

This Spring Drive model from 1969 features a 35mm PVD Black case. It features a White dial protected by a Sapphire crystal and offers 180m of water resistance. [seikata-wm-be112daf78a1]

Also known as: Helmet, Crown

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

35mm

Case Thickness

12.7mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

180m

Dial Color

White

Jewels

25j

Frequency

21,600 bph

Power Reserve

65 hours

Year

1969

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