The euphoniums at the concert had forward-facing bells and four top valves. Once again, we all talked about the difference between the baritone horn and the euphonium. Another site has a variety of pictures of both. Our school instruments belonged the "free and independent" school district and were from before World War I. It's obvious that we really did have baritone horns, and that the instrument that I was describing to the disbelief of the others is a so-called "marching baritone."