Seiko Cal. 7181 - 931

This Spring Drive model from 1973 features a 43mm Titanium case. It features a Green dial protected by a Mineral crystal and offers 130m of water resistance. [seikata-wm-8fc10bc79bc8]

Also known as: Sumo, Sportsmatic

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

43mm

Case Thickness

9.6mm

Lug Width

22mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

130m

Dial Color

Green

Jewels

29j

Frequency

36,000 bph

Power Reserve

39 hours

Year

1973

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