Seiko Cal. 5631 - 690

The Seiko 5631-690 represents an important milestone in Seiko's 1993 lineup. The Inner Rotating bezel and 41mm case give it a distinctive presence on the wrist. [seikata-wm-6cef0ceca4bb]

Also known as: Pogue, Flighty

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

41mm

Case Thickness

8.2mm

Lug Width

22mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

70m

Dial Color

Blue Sunburst

Jewels

24j

Frequency

21,600 bph

Power Reserve

62 hours

Year

1993

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