With work, this could be a playable double horn (note: there are 4 valves - 3 plus a thumb valve) and a nice second instrument.
Mouthpiece is included
Outside of the case is in very good condition, with latches and handle functional and intact (latches show a little rust which can be removed). Inside is old and a bit worn. One strap needs to be re-sewn. Case includes extra storage space for supplies.
I estimated shipping costs; if actual charges are less than this estimate, I will refund the difference.