Seiko Cal. 7181 - 155

The 7181-155 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 7181 caliber with 36j jewels beating at 21,600 bph, it delivers a 56 hours power reserve. [seikata-wm-d1fc5afef7dc]

Also known as: Monster, Flighty

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

39mm

Case Thickness

10.3mm

Lug Width

18mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

200m

Dial Color

Green

Jewels

36j

Frequency

21,600 bph

Power Reserve

56 hours

Year

1969

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