Seiko Cal. 6640 - 173

The Seiko 6640-173 represents an important milestone in Seiko's 1974 lineup. The Fixed bezel and 44mm case give it a distinctive presence on the wrist. [seikata-wm-ed870232100b]

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

44mm

Case Thickness

11.1mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

70m

Dial Color

Burgundy

Jewels

31j

Frequency

28,800 bph

Power Reserve

59 hours

Year

1974

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