My NCRS report came back as dealer 251 in zone 14. No dealer name was available, but I believe that it must have been Blaise Alexander's new (in the late 60s) dealership in south central PA. Blaise had an existing dealership in the DC area that was dealer code 250 in zone 14, so I believe that they gave the new PA Blaise dealership location the next sequential dealer code and placed it in zone 14 with the older Blaise dealership (even though most PA dealerships were not in zone 14). Blaise has an existing dealership in the Lebanon, PA area today.
If anyone can add or subtract from this information, please PM or post.