Seiko Cal. 6630 - 400

The Seiko 6630-400 represents an important milestone in Seiko's 1971 lineup. With its 19mm lug width and 14.6mm profile, it sits comfortably on most wrists. [seikata-wm-449140dc7fcc]

Also known as: Helmet

Specifications

Movement

Kinetic

Case Material

Gold-Plated

Case Width

41mm

Case Thickness

14.6mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

150m

Dial Color

White

Jewels

35j

Frequency

28,800 bph

Power Reserve

64 hours

Year

1971

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