I have not seen one of these for sale for a long time. It is a King from around 1950 in lacquer, with dual curved bells. The original hard case, in reasonable condition, is included. I would love to have this one because I played a 1-bell King in HS and later in college/CG marching band. It is the most streamlined-looking 2-bell, in my opinion (although the ones that look ungainly may actually be better for attracting attention & questions).
Seller has 100% positive rating. Starting bid is $2,199.95.
ITEM SOLD FOR BEST OFFER (AMOUNT NOT DISCLOSED) - CONGRATULATIONS TO THE WINNER!
http://www.ebay.com/itm/Vintage-King-Five-Valve-Double-Bell-Euphonium-RARE-/181917960033?