Vincent Bach "JAZZ" mouthpiece

[Posaunus]

I've never seen one of these.
https://www.ebay.com/itm/255672290410?h ... Swdj5i9UP6

Does anyone know anything about this Vincent Bach "JAZZ" mouthpiece?
[When was it made (in New York), what are its specs, who played these pieces, etc.]

[dukesboneman]

I first ran across one of these in the 1980`s, a student had one in his grandfathers trombone.
I also owned one in the early 2000`s. The "Jazz Small" is about a 12C size
Rumor has it that there were Medium and larges also but I`ve never seen any of those sizes
Both that I`ve seen were NY