Wayne, I would call the Pennsylvania Department of Revenue. They probably should have some history of the vehicle, but I am afraid that the history that they are going to give you will be that it was assembled from parts and titled on a particular date, as the special number plate would appear to be what we would call a State assigned ID number in NC (which replaces a vehicle serial number or VIN, on a reconstructed vehicle)
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Matthew C. Hinson
1929 Ford Model A Phaeton, 1976 Ford Country Squire
AACA, MAFCA, MARC