Seiko Cal. 6688 - 971

This Spring Drive model from 1965 features a 43mm Stainless Steel case. With its 20mm lug width and 12.4mm profile, it sits comfortably on most wrists. [seikata-wm-41dafe244011]

Also known as: Bullhead, Helmet

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

43mm

Case Thickness

12.4mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

80m

Dial Color

Navy

Jewels

17j

Frequency

36,000 bph

Power Reserve

45 hours

Year

1965

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