Seiko Cal. 6640 - 607

The Seiko 6640-607 represents an important milestone in Seiko's 1985 lineup. The Fixed bezel and 46mm case give it a distinctive presence on the wrist. [seikata-wm-dcea6ec59376]

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

46mm

Case Thickness

8.9mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

80m

Dial Color

White

Jewels

23j

Frequency

21,600 bph

Power Reserve

63 hours

Year

1985

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