I remember what your talking about- PanAm had 3 or 4 707's that were dedicated to charters, but IIRC, (by my dad) it wasn't until the mid 60's. They pretty much did LAX
and a couple of European Charter markets. And they changed the overhead controls and I think it went the way DL
's L-15's were for a while. I never understood that concept, because no matter what, the AC
was always hot. I was on one as a kid and remember it and asked my dad why. I remember my dad pointing out on charters, you don't always get the full serviice you would on a regular scheduled flight-circa 1966. And your right, just had a light switch and maybe a port for movies. And when the 747's came on board, they were more interested in keeping the 747's coming and weren't too concerned about updating the 707's including the charter versions. AA
did that and the rest is history.
Ah, Summer, Fenway Park, Boston Red Sox and Beer.....