I number of years ago I picked up a New York Bach "Jazz Model- small"

I had a student back in the `80`s that had one and I was intrigued

I know nothing about this mouthpiece . I just got done playing it, (because I just found it).

Interesting.... about the size of a 12C but not a 12C. seems to have a different backbore and slightly

different cup shape but not by much (could be good old Bach inconsistency)

Was there a Model - Medium, Jazz Model - Large?/

Anyone know?

I actually like the way it plays, KILLER upper range