Seiko Cal. 6690 - 331

This Spring Drive model from 1990 features a 38mm Titanium case. With its 21mm lug width and 11.9mm profile, it sits comfortably on most wrists. [seikata-wm-914a05cce5d4]

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

38mm

Case Thickness

11.9mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

180m

Dial Color

Green

Jewels

33j

Frequency

21,600 bph

Power Reserve

43 hours

Year

1990

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