Steelie identification

Can somebody help me identify these steelies. I think they are factory 1975 Plymouth Duster wheels. But I am unsure. The rim measures 15" in diameter but that is edge to edge. But I think it's a 14"?

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Right way to measure a wheel is on the bead surface. If it's 15 lip to lip, it's a 14. You can measure from the the inside of the bead, then add a about 3/16 to get the real size (ish).