A story about me! Lol!
Wow welcome aboard
I had a similar story but not on ddf and not with a 150 yr old siddur
I was a bochur doing the Israel thing,
I passed a shull not to far from the Mir and they're getting rid of all left over belonging s including shamois they said there is a Tnyeiyhhh (not sure how to spell it) that anything left over is hefker regardless if it has a name Simon etc, I found a nice English artscroll with a name and number I didn't want to take it because it had someone's name, he said don't worry its yours there's a sign.....
So I gladly took it and brought it back with me, I came home and showed it to my father he made me call that number, and the one who answered was a chosson and the vort was that night,
I brought it over to the vort and he was more then happy to get it back