Seiko Cal. 6663 - 366

The Seiko 6663-366 represents an important milestone in Seiko's 1978 lineup. Powered by the 6663 caliber with 22j jewels beating at 28,800 bph, it delivers a 63 hours power reserve. [seikata-wm-ee240bb1805f]

Also known as: Navigator

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

35mm

Case Thickness

12.4mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

150m

Dial Color

Champagne

Jewels

22j

Frequency

28,800 bph

Power Reserve

63 hours

Year

1978

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