I recently got a Besson Prototype 5 valve saxhorn/euphonium as a gift. The serial number is 50496 on the 1st valve, which upon a serial check lists it as built in 1892. I believe it to be a first generation euphonium but it seems to appear more like a modern saxhorn, as it doesn't have the bell flare a euphonium has and also, the lead pipe goes into the valve casing more like a modern saxhorn.
The horn is in pretty decent shape with some dings and dents but it plays very stuffy. So much so that that I have had to use a lot of 4th and 5th valve combination for notes to speak well. I realize this is a non-compensating horn, so that attributes to part of having to use the 4th and 5th so much to center notes.
My question is, does anyone have a fingering chart for it or have much information on it?
Thanks!