Seiko Cal. 7181 - 157

This Spring Drive model from 1971 features a 44mm Titanium case. Powered by the 7181 caliber with 22j jewels beating at 36,000 bph, it delivers a 57 hours power reserve. [seikata-wm-a65cd1de809f]

Also known as: UFO, Goldfeather

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

44mm

Case Thickness

12.9mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

170m

Dial Color

Black

Jewels

22j

Frequency

36,000 bph

Power Reserve

57 hours

Year

1971

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