Ha! That looks like it's in an area that would be suspect to me, too.
I don't think it came from the high school there, though. I don't think they have any Yamahas, but I could be wrong.
Nick
(This horn list more to remind me what I have than to brag)
1984 Conn 12J
1990s Kanstul 900-4B BBb
1924 Holton 122 Sousa
1972 Holton B300 Euph
If you see a Willson 2900, serial W2177, it's been missing for a long time. Help me bring it home.