Seiko Cal. 6690 - 790

The Seiko 6690-790 represents an important milestone in Seiko's 1989 lineup. Powered by the 6690 caliber with 21j jewels beating at 21,600 bph, it delivers a 65 hours power reserve. [seikata-wm-1a3bb9e5cbe3]

Also known as: UFO

Specifications

Movement

Solar

Case Material

Hardlex-Coated Steel

Case Width

46mm

Case Thickness

10.6mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

150m

Dial Color

Burgundy

Jewels

21j

Frequency

21,600 bph

Power Reserve

65 hours

Year

1989

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