Seiko Cal. 4591 - 923

This Spring Drive model from 1967 features a 44mm PVD Black case. With its 19mm lug width and 14.9mm profile, it sits comfortably on most wrists. [seikata-wm-6231b33bed90]

Also known as: Monster, Emperor

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

44mm

Case Thickness

14.9mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

180m

Dial Color

Blue Sunburst

Jewels

36j

Frequency

36,000 bph

Power Reserve

65 hours

Year

1967

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