Seiko Cal. 5631 - 878

The Seiko 5631-878 represents an important milestone in Seiko's 1987 lineup. It features a Cream dial protected by a Hardlex crystal and offers 50m of water resistance. [seikata-wm-a610ad375b6c]

Also known as: Emperor, Arnie

Specifications

Movement

Kinetic

Case Material

PVD Black

Case Width

36mm

Case Thickness

15.1mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

50m

Dial Color

Cream

Jewels

20j

Frequency

21,600 bph

Power Reserve

60 hours

Year

1987

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