Seiko Cal. 6639 - 556

The 6639-556 is a sought-after Quartz piece from Seiko's golden era. Powered by the 6639 caliber with 22j jewels beating at 21,600 bph, it delivers a 66 hours power reserve. [seikata-wm-a72b36cd6cc4]

Also known as: Crown

Specifications

Movement

Quartz

Case Material

Stainless Steel

Case Width

44mm

Case Thickness

13.9mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

80m

Dial Color

Champagne

Jewels

22j

Frequency

21,600 bph

Power Reserve

66 hours

Year

1990

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