My son, Jonathan, will be attending Penn State this fall, and he plans to play Sousaphone in the Blue Band. I was checking out the band building with my parents yesterday, and got to see one of the Conn 20K's that are used on game day (the horns in the rack behind me are the practice horns - mostly old Kings, as far as I can tell).
We also found something of an historic Sousaphone among the Land-Grant Frescoes in the lobby of Old Main, which were painted in 1940:
Here's the exterior of Old Main - we enjoyed a glorious June day in State College, PA. This life-long USC Trojan is starting to grow quite fond of Penn State (of course, winning the epic Rose Bowl this past January helps)!