Indeed, they should have the part number on the inside of the bezel, in the recess where the chrome ring rivets (bradded) to the plastic. Part number is preceeded by "BC-". I have a whole stack of used rings, plus NOS chrome trim and plain plastic pairs. All of them are argent silver in color, with the exception of a black pair, and I can see argent under the black. I can provide a pic if you need one, but I'll have to wait for some better lighting conditions - pretty hard to focus on the number in a poorly lit garage.