Seiko Cal. 6690 - 812

The Seiko 6690-812 represents an important milestone in Seiko's 1973 lineup. The Bidirectional bezel and 39mm case give it a distinctive presence on the wrist. [seikata-wm-9e40fb1b9397]

Also known as: Silverwave, Sea Horse

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

39mm

Case Thickness

15.9mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

50m

Dial Color

Blue Sunburst

Jewels

25j

Frequency

21,600 bph

Power Reserve

45 hours

Year

1973

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