Seiko Cal. 6638 - 637

The Seiko 6638-637 represents an important milestone in Seiko's 1979 lineup. With its 19mm lug width and 13.8mm profile, it sits comfortably on most wrists. [seikata-wm-98eacdd354eb]

Also known as: Goldfeather, Sea Horse

Specifications

Movement

Automatic

Case Material

Gold-Plated

Case Width

35mm

Case Thickness

13.8mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

40m

Dial Color

Burgundy

Jewels

18j

Frequency

36,000 bph

Power Reserve

64 hours

Year

1979

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