Hello Gianandrea,
Thanks for the reponse. I also look forward to a response from noted expert on Italian WW.II aircraft John Beaman. It will be interesting to discover his response to see his response to this link in view of his belief that the aircraft shown in the original link is not a WW.II aircraft
http://aviarmor.net/aww2/trainer/ita...oni_ca.603.htm
or this
http://www.airwar.ru/enc/other2/ca602.html
Try running them through google translate.
Ciao,
Clint