New shape in the air seen in the western spinnish coast, taken by an amateur photograph in may 18th, 1966. The jet taken in image was never seen in an official declaration or presentation.
The photographer explicitly said "I couldn't wait for it to pass. I heard such an unusual sound, like a loud wisper. It passed quite slowly for such a shape, like no more than 700 km/h. He had a shape no other known jets have."

-pictures by Grez Valveder-

Following the publication of the pictures, no company made any announcement until early 1968.

The announce:

GCI have been forced to act upon the publication of a 'wispering slow jet'. It is indeed, as the rumours said, a vehicle developped by GCI. We can't give any specification as of yet. We can for now annouce that it is in an aerodynamic test in semi-real conditions and that it's been 5 years now that we were working on it. It will bring great advance to the empire, that is for sure. - Communications and Commercial Director of GCI