1957 Ford Thunderbird convertable toy car

It is a red with tan interior 1957 Ford Thunderbird convertable toy car. It is somewhat self propelled, the rear wheel axle has a gear in the middle of it that goes inside of car, there appears to be a round weight  attached to another gear, so that when you push the car it keeps going because the spinning round weight. the front wheels don't turn and the doors, hood, and trunk don't open. The car has very little rust ( light surface rust) on the under side of it and on the axles. The front and rear bumpers appear to be made of plastic, the finish on the bumpers is lightly worn off. There isn't any other damage on the car. I don't have any pictures to send.