Icelandic flew a number of stretched DC-8's leased from Seaboard World in the early 1970's. This short body DC-8-54 was the only airplane I saw with an Icelandic registration. It was parked outside Lockheed Air Service's hangars 1/2 getting some maintenance between flights.
My father, Rasmus Pettersen, took this picture at the old IAB at JFK. My mother and I flew in this DC-4, named "Hekla", to Norway in the summer of 1954. Shortly after this picture was taken, it was replaced by DC-6's on the North Atlantic run.