Seiko Cal. 6639 - 618

The 6639-618 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 6639 caliber with 35j jewels beating at 21,600 bph, it delivers a 44 hours power reserve. [seikata-wm-c9378015acaf]

Also known as: UFO, Emperor

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

40mm

Case Thickness

13.9mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

200m

Dial Color

Blue Sunburst

Jewels

35j

Frequency

21,600 bph

Power Reserve

44 hours

Year

1993

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