Seiko Cal. 6663 - 204

This Spring Drive model from 1977 features a 35mm Hardlex-Coated Steel case. Powered by the 6663 caliber with 24j jewels beating at 36,000 bph, it delivers a 69 hours power reserve. [seikata-wm-75c39d6d5bb4]

Also known as: UFO, Sportsmatic

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

35mm

Case Thickness

11.2mm

Lug Width

22mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

170m

Dial Color

Champagne

Jewels

24j

Frequency

36,000 bph

Power Reserve

69 hours

Year

1977

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