Yep, but in the late '60's the term the jumbo jets applied to all the large new aircraft: A.300, TriStar, DC 10, Galaxy and the 747 which it seemed to just stick with.
Jumbo was a 'class' and a few still think of the term in a wider use.
Probably written by some old codger
Garry
"In the world of virtual reality things are not always what they seem."
Beautiful! Now if Airbus had thought to contact Peter for assistance we might have seen a diamond formation eight point roll thrown in for good measure.