Seiko Cal. 6639 - 397

The Seiko 6639-397 represents an important milestone in Seiko's 1974 lineup. With its 19mm lug width and 9.1mm profile, it sits comfortably on most wrists. [seikata-wm-bb0eed2bbb99]

Also known as: Silverwave, Emperor

Specifications

Movement

Kinetic

Case Material

PVD Black

Case Width

38mm

Case Thickness

9.1mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

90m

Dial Color

Silver

Jewels

27j

Frequency

21,600 bph

Power Reserve

71 hours

Year

1974

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