Be really interesting to know where the man served..... Johnny Turk was a devoted 7.62 user and had a wide variety of rifles, mostly Mausers. My old friend Sgt. Angus Kellie (51Dvn Arty, 380 Siege Bty) told me that they burned beautifully. They used to pile them up so that the Turkish prisoners couldn't get at them because they didn't have enough men for guards.... so they would Put Johnny Turk into the bag, take away his rifle, let Johnny go and burn the rifles. That was Palestine campaign: Gaza, Beersheba, Jerusalem, Armageddon, Damascus.
A 7.65 carbine would be a LOT of fun to play with. The cartridge is ballistically identical to the .303, uses same powder, caps and bullets: just the casing is different. Brass can be bought or made from 8x57, 7x57, .30-'06 or, if you are really cheap (like me) you can stretch the necks of .308 and use those.... just blow them our carefully. Lotsa funs.
A real little toy..... somebody is very darned lucky. These things had wonderful workmanship!