Seiko Cal. 6639 - 450

The 6639-450 is a sought-after Kinetic piece from Seiko's golden era. It features a Green dial protected by a Hardlex crystal and offers 180m of water resistance. [seikata-wm-ea47c8b15a27]

Also known as: Goldfeather, Sportsmatic

Specifications

Movement

Kinetic

Case Material

Titanium

Case Width

42mm

Case Thickness

15.6mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

180m

Dial Color

Green

Jewels

18j

Frequency

21,600 bph

Power Reserve

65 hours

Year

1971

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