Seiko Cal. 6640 - 979

The 6640-979 is a sought-after Quartz piece from Seiko's golden era. The Rotating bezel and 41mm case give it a distinctive presence on the wrist. [seikata-wm-9f7edc22bf2a]

Also known as: Turtle, Silverwave

Specifications

Movement

Quartz

Case Material

Stainless Steel

Case Width

41mm

Case Thickness

14.5mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

80m

Dial Color

Burgundy

Jewels

23j

Frequency

28,800 bph

Power Reserve

58 hours

Year

1969

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