Seiko Cal. 5631 - 691

The Seiko 5631-691 represents an important milestone in Seiko's 1989 lineup. The Coin-Edge bezel and 43mm case give it a distinctive presence on the wrist. [seikata-wm-3bf424e90be2]

Also known as: Silverwave

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

43mm

Case Thickness

8.2mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

80m

Dial Color

Cream

Jewels

34j

Frequency

36,000 bph

Power Reserve

72 hours

Year

1989

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