Seiko Cal. 5631 - 568

The Seiko 5631-568 represents an important milestone in Seiko's 1965 lineup. The Inner Rotating bezel and 43mm case give it a distinctive presence on the wrist. [seikata-wm-912cf3eca897]

Also known as: Monster

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

43mm

Case Thickness

14.6mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

140m

Dial Color

Cream

Jewels

23j

Frequency

21,600 bph

Power Reserve

55 hours

Year

1965

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