Seiko Cal. 6631 - 586

The Seiko 6631-586 represents an important milestone in Seiko's 1972 lineup. The Bidirectional bezel and 41mm case give it a distinctive presence on the wrist. [seikata-wm-c847211dee92]

Also known as: Pogue, Baby Tuna

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

41mm

Case Thickness

9.7mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

100m

Dial Color

Blue Sunburst

Jewels

23j

Frequency

28,800 bph

Power Reserve

53 hours

Year

1972

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