Ok, just so we are clear. Min Leibrook never played a bari sax (well maybe he tried one for 10 mintues in a music store in 1923, but who knows haha). He played bass sax, double bass, and tuba. I know Min played a Conn bass sax, but he may also have played a Buescher bass sax early on. He played a Buescher sousaphone while he was with the Wolverine Orchestra(with Bix) - see photo -
I do not know what kind of horn Mike Trafficante played. I do know there is color film for The Fabulous Dorseys and better picture quality out there, but I don't have it.
I would have to guess the tuba in the film is probably a Martin or maybe a York.
-Dave