Seiko Cal. 6639 - 950

The 6639-950 is a sought-after Solar piece from Seiko's golden era. Powered by the 6639 caliber with 31j jewels beating at 28,800 bph, it delivers a 63 hours power reserve. [seikata-wm-08d2461ae247]

Also known as: Crown

Specifications

Movement

Solar

Case Material

Titanium

Case Width

41mm

Case Thickness

12.1mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

140m

Dial Color

Navy

Jewels

31j

Frequency

28,800 bph

Power Reserve

63 hours

Year

1966

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