Seiko Cal. 6640 - 665

The 6640-665 is a sought-after Kinetic piece from Seiko's golden era. Powered by the 6640 caliber with 28j jewels beating at 36,000 bph, it delivers a 71 hours power reserve. [seikata-wm-dc06e32f2ae0]

Also known as: Emperor, Flighty

Specifications

Movement

Kinetic

Case Material

Titanium

Case Width

37mm

Case Thickness

14.8mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

70m

Dial Color

Champagne

Jewels

28j

Frequency

36,000 bph

Power Reserve

71 hours

Year

1985

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