Seiko Cal. 6691 - 680

The Seiko 6691-680 represents an important milestone in Seiko's 1972 lineup. Powered by the 6691 caliber with 28j jewels beating at 28,800 bph, it delivers a 39 hours power reserve. [seikata-wm-df5c5e6ff84a]

Also known as: UFO

Specifications

Movement

Kinetic

Case Material

Titanium

Case Width

38mm

Case Thickness

9.2mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

100m

Dial Color

Blue Sunburst

Jewels

28j

Frequency

28,800 bph

Power Reserve

39 hours

Year

1972

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