The Library of Congress has a section dedicated to unknown film stills they have but don't know what movie it's from. Check it out if you're a film buff. (blogs.loc.gov)
I'm not much of a film buff but I did give them a look. A lot of the stills are actually pretty cool but I don't recognize a single one.
That Time the President Pardoned and Adopted a Pet Raccoon (blogs.loc.gov)
Calvin Coolidge, 30th President of the United States, may have been one of the lesser known presidents in our nation's history, but he wasn't without memorable quirks....