This is probably the best Italian language site I've found on guns in general.
http://www.earmi.it/default.htmThis is a site with a pretty complete list of proof marks:
https://www.earmi.it/armi/database/Guida...0da%20fuoco.pdf I was looking for the particular fascist stamp put on guns in the Mussolini era..the "Fascio." The "Fascio" is just the old Roma "Fasce"....the bundle of sticks with an ax in the middle symbolizing authority and judicial legality adopted and used by many countries including the USA (used to be on the back of dimes). I've not found it on a gun but here is what it looks like.



Searching for "PUNZONATURE SULLE ARMI" - stamps on arms - hasn't turned the "Fascio" up. Maybe someone has a 1930's Beretta or some other Italian gun with this stamp... It would be interesting to see it.