Originally Posted by
boeing_eng
I recall in the late 70's the Condor's using the reg on the R/T instead of a flight number.....
Surprising - but true! So did Bavaria and I suspect Germanair as well, although I'm sure Germanair used flight numbers for their first series in 1970 (Germanair 648/654 Tue a.m. and Germanair 655/649 Tue evening, Dusseldorf-Luton-Munich-Athens and back). Going back further, B.E.A. used registrations preceded by "Bealine" until around April 1969. Court Line/Britannia/Midland also used registrations, at least until the early 70's, but Monarch used flight numbers from their start up in April 1968. I also remember the Tarom Ilyushin 18's in 1971/72 calling registrations. Luton-wise I think most other operators were using flight numbers. Invicta used the callsign "India Mike" which was their flight number prefix IM.
Any further info on the subject very welcome!