could this be a mold for resin slot cars?
http://cgi.ebay.com/RUBBER-TOY-CAR-MOLD-UNIQUE-OLD-DIFFERENT_W0QQitemZ260090227053QQihZ016QQcategoryZ30QQrdZ1QQcmdZViewItem
http://cgi.ebay.com/RUBBER-TOY-CAR-MOLD-UNIQUE-OLD-DIFFERENT_W0QQitemZ260090227053QQihZ016QQcategoryZ30QQrdZ1QQcmdZViewItem