Seiko Cal. 5631 - 980

The Seiko 5631-980 represents an important milestone in Seiko's 1991 lineup. It features a Blue Sunburst dial protected by a Sapphire crystal and offers 110m of water resistance. [seikata-wm-d52aa3e954ca]

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

44mm

Case Thickness

9.9mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

110m

Dial Color

Blue Sunburst

Jewels

31j

Frequency

28,800 bph

Power Reserve

53 hours

Year

1991

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