I have a few. My proudest would be my autographed baseball collection (I have over 30 signed baseballs, a signed Pete Rose jersey and a signed Pete Rose baseball bat), but I also have a circa-1925 15ct gold-tipped fountain pen and stand that belonged to my great-great-great uncle, as well as a first-aid kit that that same great-great-great uncle carried with him during WWI, complete with empty medicine bottles. He wrote down the words to a hymn of some kind and that was kept inside of the kit, but the paper is falling to shreds. I kept it anyway.