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Throw it on ebay with some story about how it was part of a land speed record prototype project and see what bites.
Merc, I had to laugh when you posted this. Last year on ebay there was a guy selling an "authentic" Ford trumpet horn that "was found only on 1954 F100s". Now I don't know everything about F100's and thought there may be a chance he had a rare find but I thought something smelled fishy. I contacted him and repeatedly asked for a part number or even a FOMOCO logo on the horn. He kept swearing up and down it was a true Ford part. After days of back and forth he finally admitted it was an aftermarket horn he got off a Studebaker. I still laugh when I think about that conversation.
As for the window visor, here is a possible tagline: "Own a piece of automobile history, one-of-a-kind window visor from H. Ford's own truck" LOL
