Seiko Cal. 5631 - 891

The Seiko 5631-891 represents an important milestone in Seiko's 1994 lineup. It features a Navy dial protected by a Hardlex crystal and offers 100m of water resistance. [seikata-wm-89d715932c7a]

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

35mm

Case Thickness

10.8mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

100m

Dial Color

Navy

Jewels

17j

Frequency

21,600 bph

Power Reserve

42 hours

Year

1994

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