Seiko Cal. 6664 - 720

The Seiko 6664-720 represents an important milestone in Seiko's 1978 lineup. Powered by the 6664 caliber with 22j jewels beating at 36,000 bph, it delivers a 64 hours power reserve. [seikata-wm-16f9bd1f6a6b]

Also known as: Emperor

Specifications

Movement

Hand-Winding

Case Material

Gold-Plated

Case Width

45mm

Case Thickness

9.8mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

30m

Dial Color

Blue Sunburst

Jewels

22j

Frequency

36,000 bph

Power Reserve

64 hours

Year

1978

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