Seiko Cal. 6691 - 970

The Seiko 6691-970 represents an important milestone in Seiko's 1970 lineup. With its 18mm lug width and 12.3mm profile, it sits comfortably on most wrists. [seikata-wm-8866368a43d5]

Also known as: UFO, Sportsmatic

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

34mm

Case Thickness

12.3mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

150m

Dial Color

Navy

Jewels

21j

Frequency

36,000 bph

Power Reserve

40 hours

Year

1970

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