I had a friend that worked at a Burger Chef. His job was to add the "secret" ingredient to the ground whatever when it came in. Being inquisitive teenagers we asked if he knew what the "secret" ingredient was? Oatmeal.
With my poor vision they looked like they could have been 57 Ford dogdish. Both are nice looking hub caps.
Not a good angle but check the hubcaps on the 59Ford wagon: Not disputing anything only trying to justify how I made the connection.