Seiko Cal. 6639 - 438

The 6639-438 is a sought-after Quartz piece from Seiko's golden era. It features a Champagne dial protected by a Hardlex crystal and offers 130m of water resistance. [seikata-wm-9f9b303f226a]

Also known as: Sumo

Specifications

Movement

Quartz

Case Material

Titanium

Case Width

34mm

Case Thickness

15.9mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

130m

Dial Color

Champagne

Jewels

19j

Frequency

36,000 bph

Power Reserve

70 hours

Year

1979

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