Seiko Cal. 6639 - 234

The Seiko 6639-234 represents an important milestone in Seiko's 1967 lineup. The Inner Rotating bezel and 40mm case give it a distinctive presence on the wrist. [seikata-wm-fe2d06ded406]

Also known as: Goldfeather

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

40mm

Case Thickness

11.4mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

150m

Dial Color

Blue Sunburst

Jewels

34j

Frequency

28,800 bph

Power Reserve

72 hours

Year

1967

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