Rolled back odometer anyone?

In the early sixties, Hill-Kelly Dodge in Pensacola, Florida had a 60 Dodge Phoenix D500 convertible with a long ram 383, black with a white top. First time I looked at it (I was way too young to drive, just curious), odometer showed a bit over 60K. Next time I looked, maybe 30-40K. Last time I looked, 20K. Would love to have that car today, though.