Maybe Italian, but I vaguely remember shooting stuff like this back when I was a kid in the '60s. IIRC there was a lot of Dominican Republic .30 carbine ammo floating around at the time. When I visited that country later on in the mid-eighties they had cops or troops still carrying carbines, Garands and Thompsons!
The D.R. even invented their own select-fire weapon to fire .30 carbine, they were so fond of the round. Cristobal carbine they called it, looked something like a Beretta 38 SMG. The ammunition in question came from Interarms I think, but could be wrong.
Those were the days, Carcanos for 15 bucks a piece and an 18 round box of ammo on STRIPPER CLIPS for a buck, from your local K-Mart ........