I think that had to do with IRAN AIR back-up given probably by PAN AM. Please don't forget that some aircrafts from IRAN AIR where ex: PAN AM look at this:
EP-IRJ - B.707-321BA ex: N416PA Clipper Paul Jones
EP-IRK - B.707-321CF ex: N445PA Clipper Archer
Also I know that the Shah of Persia had a personal B. 707-386C - EP-HIM, had a great livery I think but I've never seen a photo of that aircraft. Now is with IRIAF as 1001!
CV990, the Maserati of the skies!