WHBM --
Thank you very much! .I did not know about "planelist.com". (Obviously!) I am wrong about there being 3 DC-4s, but I know I flew in one of Aramco's DC-4s at least once or twice before any of Aramco's DC-6s were built.
This site is great -- 3 replies in less than 5 hours to a question I was pretty sure was very difficult to answer. Amazing..... Thank you, each of you. Looking forward to seeing names attached to the tail numbers of those two DC-4s.
(The "Camel" was the only plane that I remember being named in the old company newsletters I read on line some years ago.)