good news! Emiliano supposition is right!
I noticed this woman on Fellini's faces
unfortunately I haven't the book, but TRS has it!
so I've asked to him to check ...and here what he found:
According to Fellini's faces
book the woman in the pic is GIOVANNA DE VITA
and I've no doubt: this is the same woman we are looking for!
tnx to TRS for the precious help