Four Mustang pedal cars

This is a picture of 4 of my Mustang pedal cars. These are all original cars made by AMF of Olney, IL. The two inside cars I am fairly certain are of the earliest made cars, from 1964. The two outside cars, Mustang 535's, are nearly identical and I am also fairly certain are from 1969 or 1970. Please check out and "Like" my cars @ facebook.com/campedalcar