Hi People, thanks for your words. I can remember when a was a child that sometimes my uncle took my brother and me in a ride to Madrid airport just to see airliners landing and taking off. When security was not such concern you could be very close to the planes, you could feel the the hot air and smoke from those big piston engines expeled when taxiing. When a jet was something rare and thrilling.
For me, the elegance, beauty and glamour of those DC-7s, Super Constellations, Britannias, Metropolitans,... cannot be seen anymore in modern jets, so difficult to distinguish.
And, of course, a was a child! hahahaha