Ford dealer number 15H508?

[Bigfoot]

I don't know if they were a Shelby dealer, but they were certainly selling high-performance vehicles.
Anybody know what Dealership is dealer 15H508 On cars from the 60s up to 70-ish?
Thnx

[TransamEd]

Newark Dealer, some of them exported to other countries. Have some 15Es on file. Any further hint, what type of car you are referring to?