I flew out to Zambia in a 707 (Zambia airways wet lease from aer lingus) in 1975 and this was my first jet airliner experience .When my contract was up I left again on a 707 but this time had to transfer in Rome to a BA flight,this was 1/1/1978!Here it came and it was a 747 ,I remember on entering being looked at by an almost full aircraft (it was coming from I think NZ) and I was amazed at the size of it!!!I still have a small amount of cine of the take of !!Years later I managed a cockpit visit and was chatting to the flight engineer who told me he was retiring as his position would be redundant on the next generation of 747.Turned out he had been an instructor at St Athan when I was a boy entrant there.Loved flying in the 747 ,managed a Pan Am flight before they shut down.