See it in Classified.................banjohangout.org/classified/88081
curious. I never saw an arch-top hoop tone ring. who made or makes them . thank you.
Overhere such tone hoops (not "ring) were very common on the RB 100s and 150s. They were also used on many pre war Style 1 and 2 banjos that had one piece flanges. Some Style 10s and 11s too.
Rather than find someone who "makes" them, you can easily and cheaply buy an original one, leftover from a non-Mastertone banjo that got converted to Mastertone by discarding the tone hoop, cutting the wood rim down, and adding an aftermarket heavy weight Mastertone-style tone "ring".