Thanks for the heads up regarding contact. I'll post my email address.
Yes, I just bought a euphonium. I'm about an hour drive from White River Jct.

Serial # 79706 JW York & Sons--three valve side-action. There is plating wear in the usual places for a 100 year old horn, but no major dents. Main tuning slide inside diameters are .785--.810". Bell diameter is 22-1/2". Large, rich York sound. This is a Big Horn! Leadpipe takes the original ...