Seiko Cal. 6640 - 672

The Seiko 6640-672 represents an important milestone in Seiko's 1980 lineup. The Bidirectional bezel and 44mm case give it a distinctive presence on the wrist. [seikata-wm-3a522b688290]

Also known as: Silverwave, Emperor

Specifications

Movement

Kinetic

Case Material

Gold-Plated

Case Width

44mm

Case Thickness

8.0mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

190m

Dial Color

Navy

Jewels

33j

Frequency

28,800 bph

Power Reserve

69 hours

Year

1980

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