Seiko Cal. 7181 - 997

This Spring Drive model from 1971 features a 41mm Titanium case. Powered by the 7181 caliber with 24j jewels beating at 21,600 bph, it delivers a 66 hours power reserve. [seikata-wm-d14b60d33b90]

Also known as: Monster

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

41mm

Case Thickness

15.9mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

120m

Dial Color

Green

Jewels

24j

Frequency

21,600 bph

Power Reserve

66 hours

Year

1971

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