My school has a rather poorly funded band program and we have few school instruments which includes one baritone saxophone, which is marked Conn 13m. I have a chance to purchase it from the school system for very cheap since it’s kind of a P.O.S. and it definitely is in the condition you would expect a school bari to be in. It would take a decent chunk of change to get it in a good playing condition, I know the 11m and 12m are very nice horns but I know very little about the 13m and the internet hasn’t helped much but, from what I’ve gathered they were Conns high pitch low a model bari, but this seems a bit redundant to me, since Conn already stamped there horns with High or Low pitch. If the h.p. thing is correct I don’t think I’ll buy it considering it’s limited use. Any info on this horn would be much appreciated, I’ve played it a little but it’s got leaks all over the place so I don’t have a great idea on what the tone sounds like.