I am trying to figure out which of two types of Wheel rims are original for my 1955 Cadillac Convertible. See attached photos, they are the same size but the way the center is attached to the outer rim is different, kind of backwards from each other. The Black ones came on my Convertible and the White ones were on a Coupe deville I have for parts. Any body know?

Eric Larson
Sonoma CA