Seiko Cal. 4531 - 634

This Spring Drive model from 1977 features a 45mm PVD Black case. With its 20mm lug width and 10.6mm profile, it sits comfortably on most wrists. [seikata-wm-f0ff88a76f9e]

Also known as: Sea Horse

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

45mm

Case Thickness

10.6mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

160m

Dial Color

Black

Jewels

29j

Frequency

36,000 bph

Power Reserve

63 hours

Year

1977

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