On my Airstream the numbers are on the vertical frame work on each side of the radiator. Look in the front with the access door open and the VIN number is on one side and the Airstream number is on the other side. I don't believe they used the dash tag that far back.
"Socialist governments traditionally do make a financial mess. They always run out of other people's money. It's quite a characteristic of them."
~ Margaret Thatcher ~