Seiko Cal. 7131 - 493

The Seiko 7131-493 represents an important milestone in Seiko's 1967 lineup. It features a Green dial protected by a Hardlex crystal and offers 150m of water resistance. [seikata-wm-530ff18bdd34]

Also known as: Monster, Tuna

Specifications

Movement

Quartz

Case Material

Titanium

Case Width

37mm

Case Thickness

15.8mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

150m

Dial Color

Green

Jewels

17j

Frequency

28,800 bph

Power Reserve

68 hours

Year

1967

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