Your dagger is a standard MVSN fighting knife that was issued to officers. From what info I had collected on mine was that wood (brown) colored grips were enlisted, black was officers and white was general officers. I sold mine sans the Fascist logo on the scabbard a few years back for $400-$500 to a collector in Italy. I can suggest that you post these pics
COMMANDO SUPREMO it is an Italian militaria collectors site.