Above, stills from Pink Floyd’s set (Astronomy Domine)
There’s an excellent page here –
http://www.final-lunacy.it/Eventi/1968/Roma68/Roma68.htm
with many details of the festival itself, which was in Rome in May 1968. In an article on the site, it is mentioned that all the equipment was rented; it is hard to tell if this referred to the sound tech’s equipment, or everything including the amps, but a whole wall of Vox hybrid amps was used it seems by many of the bands.
The final-lunacy site includes this photo of Pink Floyd:
http://www.final-lunacy.it/Eventi/1968/Roma68/Roma68P.htm
There are some recordings here…
AND