Seiko Cal. 6663 - 403

This Spring Drive model from 1973 features a 42mm Hardlex-Coated Steel case. Powered by the 6663 caliber with 22j jewels beating at 28,800 bph, it delivers a 49 hours power reserve. [seikata-wm-e77ba2ee3c72]

Also known as: Rally, Sea Horse

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

42mm

Case Thickness

14.1mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

180m

Dial Color

Burgundy

Jewels

22j

Frequency

28,800 bph

Power Reserve

49 hours

Year

1973

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