Seiko Cal. 4540 - 910

This Spring Drive model from 1987 features a 35mm PVD Black case. Powered by the 4540 caliber with 17j jewels beating at 28,800 bph, it delivers a 72 hours power reserve. [seikata-wm-86a9ee3b7c19]

Also known as: UFO, Emperor

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

35mm

Case Thickness

9.2mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

120m

Dial Color

Cream

Jewels

17j

Frequency

28,800 bph

Power Reserve

72 hours

Year

1987

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