Shank/Leadpipe Dimensions for Euphonium

[Bob Mosso]

I just dragged my old Buescher euphonium out of the closet and joined a band. The mouthpiece has always seemed to fit on too far, I was curious if I had the wrong shank size for this horn.

The outside diameter at the bottom of the mouthpiece measures 0.430 inches. The inside diameter at the end of the lead pipe measures 0.480 inches. The mouthpiece fits inside the lead pipe 1.15 inches. I assume my mouthpiece is a small shank, does my horn need a med/euro shank mouthpiece?

If anyone has calipers and a med/euro shank mouthpiece, could you measure the outside diameter at the end for me?

Thanks in advance,
Bob (brand new to this forum)