Bacon/B&D occasionally put a maker's plate on the outside of the resonator. Some have them and some don't.
There seem to be at least a couple of kinds. One kind is a generic "Made By" plate. Another is a model designation plate.
I wonder how many varieties of Bacon or B&D resonator maker's plates exist?
I'll start with a photo of Bacon "Made By" plate on my Bacon private label Art-i-so tenor banjo.