Seiko Cal. 6631 - 748

The Seiko 6631-748 represents an important milestone in Seiko's 1967 lineup. The Bidirectional bezel and 37mm case give it a distinctive presence on the wrist. [seikata-wm-d3117e025e13]

Also known as: Shogun

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

37mm

Case Thickness

12.6mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

70m

Dial Color

Silver

Jewels

24j

Frequency

28,800 bph

Power Reserve

71 hours

Year

1967

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