Seiko Cal. 6680 - 731

The Seiko 6680-731 represents an important milestone in Seiko's 1971 lineup. With its 18mm lug width and 14.4mm profile, it sits comfortably on most wrists. [seikata-wm-3651117e2b48]

Also known as: Helmet

Specifications

Movement

Kinetic

Case Material

PVD Black

Case Width

43mm

Case Thickness

14.4mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

180m

Dial Color

Champagne

Jewels

21j

Frequency

28,800 bph

Power Reserve

57 hours

Year

1971

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