, I think I have a true pair of 1969 15X7 magnum 500 wheels from a Ford Mustang. the wheels are stamped M4 in a circle, and a 9 underneath that. please ask for more numbers if you need them. the one is in really nice shape, but the other one has some peeling chrome on it. these would need to be rechromed for a show car. sorry, but I don't have any center caps.