I would agree with Louver..the only thing is..they have had the script worked out of them. If those are Buick Caps someone worked them over pretty good to smooth them out
They don't look "worked" to me, they look like someone used paint stripper to get the paint out of the Buick emblem in the center. (Look close- even in that small picture you can still see the imprint.) Amazing what a little stripping and buffing can do!