Seiko Cal. 6640 - 930

The 6640-930 is a sought-after Quartz piece from Seiko's golden era. Powered by the 6640 caliber with 22j jewels beating at 36,000 bph, it delivers a 57 hours power reserve. [seikata-wm-d053c79b02ee]

Also known as: Crown

Specifications

Movement

Quartz

Case Material

Two-Tone

Case Width

40mm

Case Thickness

8.4mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

200m

Dial Color

Burgundy

Jewels

22j

Frequency

36,000 bph

Power Reserve

57 hours

Year

1999

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