The Italian guns were most certainly Danish.Maybe Italians got Danish Vickers guns?
The Danish Vickers-guns, 75 mm L/49 L.K. M.1932, were built on license by "Hærens Vaabenarsenal" in Copenhagen.
In April 1940 the Germans "borrowed" all 24 guns that had been produced up till then. Further 12 were produced until the end of 1942, and the rest were probably also taken over went the Danish army was liquidated on 29th August 1943.
Until the beginning of 1941 the guns were used in Denmark, then it would seem that they came to Italy. So, in early May 1941 a Danish diplomat reported that a number of guns in Mid April 1941had come the artillery depot of 1st Regiment in Vercelli. He got knowledge of this when an Italien came and aksed for translation of the brass plates from the guns.
I would be very interested in knowing what happend to the guns later on.
Jens