I have been playing on a Guardala alto (stamped made in Germany) ever since I bought it used in 1998 (I suspect it was made in the early 90’s). I love the tone and key action of the horn so much that I bought a Guardala tenor, which I also love. I prefer my Guardala horns to anything else I have ever played and will never sell them for any price. But looking at the two horns, the alto appears to have a smaller bell than the average alto and therefore produces a relatively more focused sound. The tenor appears to have a larger bell than the average tenor and therefore produces a more spread sound. Can anyone confirm this? The tone produced by the horns seems to confirm what I see, but perhaps that is psychological?