Seiko Cal. 6663 - 635

The Seiko 6663-635 represents an important milestone in Seiko's 1982 lineup. Powered by the 6663 caliber with 23j jewels beating at 28,800 bph, it delivers a 65 hours power reserve. [seikata-wm-1dfc4ff6d1e1]

Also known as: Sea Horse

Specifications

Movement

Quartz

Case Material

Hardlex-Coated Steel

Case Width

40mm

Case Thickness

15.2mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

180m

Dial Color

Cream

Jewels

23j

Frequency

28,800 bph

Power Reserve

65 hours

Year

1982

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