Thanks, Pietro
To complete the description, this aircraft was on the top of my to do pile since I spotted an 1/72 model in a contest in the 70s, but it was not until the 90s that I found a 3 view by the late Carlo Godel in Aero WWI.
That 3 views has some error, but it is sound and the proportions are right.
Some years later i discovered a booklet containing a monography on this aircraft that had been published in Italy in the 70s.
The profiles in the booklet are suspicious, though.
Further info and some photos are available at
http://flyingmachines.ru/Site2/Crafts/Craft25718.htmAlong with some photos.
An 1:1 scale flying model is preserved in a museum in the USA.
I also have a tiny 72 version still unpainted but complete