Seiko Cal. 6691 - 647

The Seiko 6691-647 represents an important milestone in Seiko's 1971 lineup. With its 18mm lug width and 11.8mm profile, it sits comfortably on most wrists. [seikata-wm-410324f745fd]

Also known as: Crown, Flighty

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

41mm

Case Thickness

11.8mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

170m

Dial Color

Navy

Jewels

33j

Frequency

21,600 bph

Power Reserve

60 hours

Year

1971

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