Seiko Cal. 5631 - 758

The Seiko 5631-758 represents an important milestone in Seiko's 1968 lineup. The Bidirectional bezel and 46mm case give it a distinctive presence on the wrist. [seikata-wm-2a9cfe37441f]

Also known as: Rally, Sea Horse

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

46mm

Case Thickness

11.8mm

Lug Width

22mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

110m

Dial Color

Blue Sunburst

Jewels

28j

Frequency

21,600 bph

Power Reserve

59 hours

Year

1968

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