Seiko Cal. 5640 - 760

The Seiko 5640-760 represents an important milestone in Seiko's 1965 lineup. The Rotating bezel and 39mm case give it a distinctive presence on the wrist. [seikata-wm-51bac6042ac8]

Also known as: Pogue, Navigator

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

39mm

Case Thickness

14.4mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

200m

Dial Color

Cream

Jewels

22j

Frequency

28,800 bph

Power Reserve

70 hours

Year

1965

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