I am sure with
I think this might be
3 Lufthansa (and not Pan Am), because of the blouse style
6 Iberia (poncho style coat)
8 SAS (must be one of the light blues)
9 KLM (must be one of the lighter blues)
15 BOAC (must be one of the dark blues)
24 Air France (must be one of the very dark blue with a high collar)
25 Air Lingus (shouldn't it be green too?)
National is still missing, weren't they yellow or orange at that time?
And what about World, Sabena, Condor, El Al, South African and TAP? They are on the picture belonging to this group of the first 25.
It's impossible, because at that time Cathay had not yet ordered 747s. They received the first 747 on 20 July 1979, after some years with the L-1011 as the only widebody in their fleet?
My favourite planes flown: Lockheed 188 Electra, Tridents, VC-10, B-707, L-1011, A330, E90 + Concorde