I have a Besson Model 181 4-valve compensating euphonium purchased in 1966. It came with a Besson 10 mouthpiece, something about which (the mouthpiece) I can find little on the internet, as far as specifications are concerned. From what I gather the shank is a Euro shank. My question is whether or not a Wick 4AL mouthpiece would fit this instrument? Thank you.