Mondadori is the oldest Principe Valentino publisher in Italy. In their serie "Albi d'Oro Mondadori", book 26 is called:
"Il principe Valentino". The book is published in 1946. Very thin book, 32 pages of which 27 PV (en de rest Mickey Mouse).
Two pages in colour, the rest black and white. This "Albi d'Oro Mondadori" serie also contains many other comic heroes.
The book contains original Foster work, except for page 7 which is a illigal re-drawn page.
The publisher probably didn't had that page.
Value around 50 Euro's.
Page 7 re-drawn