Sadly, probably nothing. My sister has a dress from the 1700s (family heirloom), in really good condition. She tried to donate it to some museums and none wanted it. Apparently, all already have too many. Interestingly, the opposite is true of men's clothes. According to one curator, women wear for fashion, so when a dress goes out of style, the old clothes get put away. Men just wear their clothes out.
Interesting. I have found a WWI helmet - (I think)...LOL.