Found some actual photos of empty wrappers here. Looks like they may have been some sort of wax paper?
https://www.candywrapperarchive.com/candy-collection/mars/
(Damn, I miss the era of weirdly-specific websites about random stuff like this.)
Found some actual photos of empty wrappers here. Looks like they may have been some sort of wax paper?
https://www.candywrapperarchive.com/candy-collection/mars/
(Damn, I miss the era of weirdly-specific websites about random stuff like this.)