Seiko Cal. 6631 - 694

The Seiko 6631-694 represents an important milestone in Seiko's 1968 lineup. The Fixed bezel and 42mm case give it a distinctive presence on the wrist. [seikata-wm-81c3bb2ba41e]

Specifications

Movement

Hand-Winding

Case Material

Gold-Plated

Case Width

42mm

Case Thickness

9.1mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

190m

Dial Color

Green

Jewels

29j

Frequency

36,000 bph

Power Reserve

55 hours

Year

1968

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