Sharp dressed man,
I have emailed you the American Rifleman July 1885 article on 1934 Berettas.
Per my experiments on a WWII bring back I got at a gun show...
The chamber wall is 0.82" in the thinnest spots, and that is good for up to triple 380 loads, and then the chamber starts to expand.
My late uncle in WWII took a 1934 Beretta from an Italian Officer that was a prisoner of war. My cousin has since sanded it down and re blued it
But I had possession of that pistol for a few months in 1972.
I have always been impressed with that pistol.
I have a picture of my mother shooting it in the late 1940s.