This is a fine example of the American breed of euphonium. It has an adjustable bell (shown at an interesting angle in the photo!) and appears to have short-action valves. Could be a great concert band horn, marching horn, or good for jazz use. No case is included.
It is seriously underpriced at its current bid level ($175), so it could end up being a nice bargain.
SOLD FOR $263 - NICE!
https://www.ebay.com/itm/164947585868