Seiko Cal. 6647 - 639

This Solar model from 1968 features a 44mm Titanium case. Powered by the 6647 caliber with 23j jewels beating at 28,800 bph, it delivers a 50 hours power reserve. [seikata-wm-5697c0a05286]

Also known as: Goldfeather, Navigator

Specifications

Movement

Solar

Case Material

Titanium

Case Width

44mm

Case Thickness

12.5mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

40m

Dial Color

Green

Jewels

23j

Frequency

28,800 bph

Power Reserve

50 hours

Year

1968

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