Seiko Cal. 4531 - 920

This Automatic model from 1978 features a 43mm PVD Black case. Powered by the 4531 caliber with 31j jewels beating at 36,000 bph, it delivers a 59 hours power reserve. [seikata-wm-0eacdc91c695]

Also known as: Sea Horse

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

43mm

Case Thickness

15.4mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

160m

Dial Color

Cream

Jewels

31j

Frequency

36,000 bph

Power Reserve

59 hours

Year

1978

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