Seiko Cal. 6647 - 887

The 6647-887 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 6647 caliber with 33j jewels beating at 28,800 bph, it delivers a 46 hours power reserve. [seikata-wm-33eed75abf6e]

Also known as: UFO, Navigator

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

46mm

Case Thickness

13.9mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

180m

Dial Color

Black

Jewels

33j

Frequency

28,800 bph

Power Reserve

46 hours

Year

1983

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