Wow, cool promo! That's very interesting and adds some context to those overlapping months when Goudey made the acquisition. Thanks for sharing it.
I happen to live a couple miles from the old National Chicle factory and confirmed there's some hardcopy on the Cambridge, MA gum and candy industry that might help with the bigger picture. They've also run a Candy Land tour of that neighborhood with several documented sites.
http://www.cambridgehistory.org/discover/candy/map.html
Note that the tour includes George Close Candy!