Grandpa on Mom's side, against the Germans. He was looked for, because he was a friend of three brothers, Fratelli Brancondi, who joined the non-communist NLF and were sentenced to death and shot at a roadside. They then started to look for all their friends, but Grandpa was informed and could hide.
After that, he kept the gun at home, hidden for the partisans, who could show up at any time just because he was a judge, so an enemy of the people.
Then he must have forgotten it, until I found a Carcano bayonet (which I still have) hidden behind his books in a big library he had at home.
I was looking for a book and... tadaaaa! So I looked around and found a Beretta 34, without some parts, three boxes of 6,5 Carcano ammo, and a MAB. The wonderful version of the picture. I asked him and he just took it from me and I never saw it again. I guess that he threw it in our water well.
A real pity...
The ironic thing is that my Grandpa lived in Loreto (Ancona), in what became Via Fratelli Brancondi 94... A wonderful palace we sold at the end of the nineties...