Seiko Cal. 5631 - 352

The Seiko 5631-352 represents an important milestone in Seiko's 1971 lineup. The Fixed bezel and 38mm case give it a distinctive presence on the wrist. [seikata-wm-cc13393bcead]

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

38mm

Case Thickness

11.8mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

50m

Dial Color

Burgundy

Jewels

26j

Frequency

21,600 bph

Power Reserve

53 hours

Year

1971

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