Do any old timers remember seeing these on a 1971?

With Ma Mopar, never say never. If it was at the end of 1971, there is a reasonable possibility it could have 1972 wheel covers. My Dad ordered a new Dodge passenger van in the mid 70's, I don't remember the exactly what year, it was at the end of the model year and the entire interior was the next model years. It was a big change from what it was supposed to have.