This is an unrestored car, and clearly has never had an antenna on the front fender. I asked the original owner about it and he is 100% certain that the antenna was exactly where it is now the day he bought it at the dealership.
This car also had the original AM radio and has never been monkeyed with.
Does the passenger side front fender have an antenna hole and or a delete plug? If not someone has patched up the hole I think all the fenders came with the antenna hole in them unless maybe it was radio delete when ordered.