Seiko Cal. 4531 - 111

This Spring Drive model from 1980 features a 39mm PVD Black case. Powered by the 4531 caliber with 17j jewels beating at 28,800 bph, it delivers a 54 hours power reserve. [seikata-wm-53e6e4c29d3e]

Also known as: Bullhead, Navigator

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

39mm

Case Thickness

9.7mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

200m

Dial Color

Green

Jewels

17j

Frequency

28,800 bph

Power Reserve

54 hours

Year

1980

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