Seiko Cal. 6639 - 688

This Spring Drive model from 1969 features a 35mm PVD Black case. With its 18mm lug width and 14.8mm profile, it sits comfortably on most wrists. [seikata-wm-5199582732fa]

Also known as: Silverwave, Navigator

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

35mm

Case Thickness

14.8mm

Lug Width

18mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

80m

Dial Color

Navy

Jewels

26j

Frequency

36,000 bph

Power Reserve

51 hours

Year

1969

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