Seiko Cal. 7131 - 150

This Hand-Winding model from 1986 features a 35mm Two-Tone case. Powered by the 7131 caliber with 34j jewels beating at 36,000 bph, it delivers a 48 hours power reserve. [seikata-wm-25606d9e0a2a]

Also known as: Monster, Bullhead

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

35mm

Case Thickness

9.7mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

70m

Dial Color

Navy

Jewels

34j

Frequency

36,000 bph

Power Reserve

48 hours

Year

1986

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