Originally Posted by Wade Garrett
If the smithsonian rumor ends up being true, then we can probably assume that they made the display sometime before he was unthawed. Since we all know that he was wearing his suit when he went down, maybe the one in the smithsonian is merely an attempt at a replica. Which ends up being a kinda badass amalgamation of the two suits. It does remind me a lot of the manip I did awhile back.
What if there wasn't only one suit, though?
Perhaps Howard Stark made several suits, with some having minor design differences. Steve used several at one point or another, and it is one of them that the Smithsonian hands up.