Date: 2019-04-07 05:03
As noted above, there are no serial number lists for Bundy clarinets. I would estimate yours to date from 1951, give or take a year.
I once had a 1950s Bundy in my studio, and was very pleased with it. Selmer USA claimed that the acoustic design of the Bundy Resonite was based on the Selmer Paris Balanced Tone clarinet, and there is indeed a certain Selmer character to the tone and response of the Bundy Resonite--though I think the early Bundys exhibit more of this Selmer character than the later ones do.
Yours, being such an early example, could very well represent the best of what this model had to offer. I'd love to give it a test play!