Seiko Cal. 6640 - 128

The Seiko 6640-128 represents an important milestone in Seiko's 1965 lineup. The Coin-Edge bezel and 45mm case give it a distinctive presence on the wrist. [seikata-wm-ccafd3fb7bf9]

Also known as: UFO, Silverwave

Specifications

Movement

Quartz

Case Material

Stainless Steel

Case Width

45mm

Case Thickness

8.6mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

100m

Dial Color

Black

Jewels

17j

Frequency

28,800 bph

Power Reserve

71 hours

Year

1965

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