Dealer Where Your Mopar Was Sold
The dealer code.
It is on the IBM build card, it you have a 67 or under and you sent $45 to Chrysler.
It is written on the glovebox door card, with the delivery date as well.
It may be on the build sheet, I don't have one so I am not sure.
Chrysler Historical Services has a list of dealer codes and the corresponding dealership.
What year is your car?