Seiko Cal. 6690 - 623

This Spring Drive model from 1979 features a 44mm PVD Black case. With its 19mm lug width and 8.7mm profile, it sits comfortably on most wrists. [seikata-wm-67e2ff14545c]

Also known as: Sportsmatic, Navigator

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

44mm

Case Thickness

8.7mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

100m

Dial Color

Burgundy

Jewels

24j

Frequency

28,800 bph

Power Reserve

52 hours

Year

1979

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