Lu, I distinctly remember the C5A did its maiden flight in about '67? I was on holiday on a boat in France and was desperately trying to understand the Paris Match article all about it (the trauma of that lives in my memory). I believe the 747 flew first in 1969 and entered service about 18 months later in 1971? And because BOAC had them grounded immediately (pilot dispute), BOAC made a fortune at loaning the engines to all the other airlines with oval casings!