I have a Callet Jazz that's quite different. First off, it's stamped w/464 meaning that it ends on a 464 bore rather than the normal 470 bore that most Jazz horns have. Second, my horn has an interesting "skin" While normal Jazz horns come in either Silver or Gold plate, mine is lacquer, and not just any lacquer, this lacquer is the deepest gold color that I've ever seen, it definitely appears to be original too. I talked to some people that know Callets really well, and they all were quite suprised w/my horn. I even talked to my teacher (Ken Brader) a man who owns 3 Jazz's himself, and know Jerry Callet personally, and he's never seen another one like mine. ANYWAY, I was wondering if anybody knew anything about what could be with my horn.