Some cards show the dealer in the upper left corner. In the example below of my '56 Plymouth IBM card, the dealer is 61024 City Plymouth in Chicago. On the lower example of my '57 Dodge, the dealer code is on the bottom and is blank so it's probably not a sold car.

As stated, only '67 and earlier are available...Price is $45.

Card.PNGCard 57 Dodge.PNG
The INTERNET, the MISinformation superhighway