Seiko Cal. 4581 - 550

This Spring Drive model from 1991 features a 40mm Gold-Plated case. With its 18mm lug width and 13.7mm profile, it sits comfortably on most wrists. [seikata-wm-9d85d55abcdc]

Also known as: Sea Horse, Emperor

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

40mm

Case Thickness

13.7mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

150m

Dial Color

Green

Jewels

33j

Frequency

36,000 bph

Power Reserve

42 hours

Year

1991

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