Seiko Cal. 6639 - 422

The 6639-422 is a sought-after Quartz piece from Seiko's golden era. With its 20mm lug width and 11.7mm profile, it sits comfortably on most wrists. [seikata-wm-6c1ca52ef5b3]

Specifications

Movement

Quartz

Case Material

Two-Tone

Case Width

36mm

Case Thickness

11.7mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

50m

Dial Color

Green

Jewels

24j

Frequency

21,600 bph

Power Reserve

64 hours

Year

1987

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