[gary rabbitt]

Thanks guys for the thoughts on the foil's original use. I agree it could have been material for a candy box.
It was pretty intricate and decorative, unlike the foil from a cigarette pack or gum wrapper.

Philco no doubt didn't care what the pattern was , it was a foil that helped shield the chassis bottom from stray signals.
End runs of the stuff would otherwise be tossed by the original user,so IMHO Philco bought it.

This is one of those topics that I have not seen anywhere else.

@Arran, without going and pulling a chassis, I 'think' the foil did have a very thin backing. The entire thing was stapled to the bottom of the cabinet. I seem to remember trying to repair the crumpled foil if it was scuffed or pulled away from it's backing.
How much improvement of shielding was had, compared to a cabinet without it? I have no plans on testing that , lol
Take care and thanks to all!
Gary Maker.