Seiko Cal. 6640 - 746

The Seiko 6640-746 represents an important milestone in Seiko's 1987 lineup. With its 19mm lug width and 10.8mm profile, it sits comfortably on most wrists. [seikata-wm-c4bf238bb858]

Also known as: Goldfeather

Specifications

Movement

Hand-Winding

Case Material

Gold-Plated

Case Width

39mm

Case Thickness

10.8mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

170m

Dial Color

Cream

Jewels

26j

Frequency

28,800 bph

Power Reserve

40 hours

Year

1987

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