Seiko Cal. 6639 - 687

The 6639-687 is a sought-after Quartz piece from Seiko's golden era. Powered by the 6639 caliber with 32j jewels beating at 28,800 bph, it delivers a 66 hours power reserve. [seikata-wm-f8192cb867f5]

Also known as: Goldfeather

Specifications

Movement

Quartz

Case Material

Two-Tone

Case Width

46mm

Case Thickness

11.8mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

30m

Dial Color

Burgundy

Jewels

32j

Frequency

28,800 bph

Power Reserve

66 hours

Year

1988

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