Seiko Cal. 6690 - 397

The Seiko 6690-397 represents an important milestone in Seiko's 1973 lineup. With its 21mm lug width and 14.4mm profile, it sits comfortably on most wrists. [seikata-wm-f4f6337ccf33]

Also known as: Helmet, Emperor

Specifications

Movement

Quartz

Case Material

Gold-Plated

Case Width

39mm

Case Thickness

14.4mm

Lug Width

21mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

40m

Dial Color

Cream

Jewels

17j

Frequency

28,800 bph

Power Reserve

43 hours

Year

1973

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