Seiko Cal. 6640 - 493

The 6640-493 is a sought-after Kinetic piece from Seiko's golden era. With its 20mm lug width and 14.8mm profile, it sits comfortably on most wrists. [seikata-wm-f29ff34bef9a]

Also known as: Sumo

Specifications

Movement

Kinetic

Case Material

Gold-Plated

Case Width

45mm

Case Thickness

14.8mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

80m

Dial Color

Cream

Jewels

30j

Frequency

28,800 bph

Power Reserve

62 hours

Year

1990

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