Seiko Cal. 6690 - 634

The Seiko 6690-634 represents an important milestone in Seiko's 1976 lineup. Powered by the 6690 caliber with 20j jewels beating at 36,000 bph, it delivers a 62 hours power reserve. [seikata-wm-0cec45a487ac]

Also known as: Helmet, Flighty

Specifications

Movement

Kinetic

Case Material

Gold-Plated

Case Width

39mm

Case Thickness

10.9mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

120m

Dial Color

Cream

Jewels

20j

Frequency

36,000 bph

Power Reserve

62 hours

Year

1976

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