Seiko Cal. 5631 - 369

The Seiko 5631-369 represents an important milestone in Seiko's 1968 lineup. The Inner Rotating bezel and 34mm case give it a distinctive presence on the wrist. [seikata-wm-f096e7e6486f]

Also known as: Samurai, Flighty

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

34mm

Case Thickness

13.3mm

Lug Width

19mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

100m

Dial Color

Blue Sunburst

Jewels

19j

Frequency

28,800 bph

Power Reserve

68 hours

Year

1968

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