..just noticed this inquiry; sorry I missed it earlier.
The system illustrated is the " Canone Controaerei DA 75 C.K. "
It was composed of a Fiat platform truck mounting the Rheinmetall Model 1914 Kanone in 75mm.
As further information, by the outbreak of war, Rheinmetall( a division of Ehrhardt ) was fast becoming an international armaments manufacturer. This excellent AA system sold to Italy is a prime example.
