Lets play devil's advocate
He has part of 1477. There is no paperwork or serial number. These are facts.
If you take the leap and create either, I think that's illegal and you are taking a chance another version of the car doesn't exist or show up.
You can have a serial number on your vehicle, but you just cant take one you don't have.
Because, if you bet the farm and you're wrong...
Pete: I looked at a 67 Shelby awhile back and finally convinced the guy to take off the tag.
It was a nice 67 clone but it was a C Code Mustang.
The seller was still convinced it was a real car.
Finally, I looked at him and his wife and told him "if you sell this as a GT 350 about four months from now you'll get a registered letter in the mail and then a court date". I told them that I'm not the Shelby police but they're opening themselves up to a major problem down the road.
Soon after they changed their description.
Bret