Need help with 2 old Props I found in my Dads Basement.

[gerry2277]

I have 2 old props I found when cleaning out the basement of my Dads house after he passed. I'll try to attach some pictures.They say ERCO . Compreg on them and have a lot of stenciled numbers. I did a Google search and did find some of the history of the Plant in Md.
Any idea where I should list them or what they are worth would be greatly appreciated. My Father was a WW ll pilot. So I assume he picked them up in his travels. Thanks, Gerry. My E-mail is glsjr2277@msn.com