Things Like This Belong In The Smithsonian
Gordon Cooper Space Flown NASA Project Mercury Helmet, eBay
“Mechanical Visor Helmet worn by Gordon Cooper on his historic MA-9 Mercury Flight. This was purchased by me in 1995 by a reputable dealer. It was bought with the understanding that it was used by Cooper as his training helmet. I later came to realize that it was his flight helmet.”
Editor’s note: Things like this (if it is what the seller claims it is) belong in the Smithsonian.