Seiko Cal. 6690 - 642

The Seiko 6690-642 represents an important milestone in Seiko's 1982 lineup. The Bidirectional bezel and 34mm case give it a distinctive presence on the wrist. [seikata-wm-063777b0f239]

Also known as: Helmet, Emperor

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

34mm

Case Thickness

13.2mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

130m

Dial Color

Champagne

Jewels

17j

Frequency

21,600 bph

Power Reserve

69 hours

Year

1982

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