What an idiot interviewer. Dizzy owns him. I admire his control and professionalism. I don't think this clown ever even read one of Diz's record jackets. Putz
It's definitely a 10M. The 30M has a very distinctive octave key among other features, unlike this horn. He switched to a Mark VI later after this horn was stolen. It's a Berg Larsen. When he used his Mark VI he used the Otto Link.
but an influence?...Ivey Divey!