Let me state first that I do not know much about musical instruments From what I can tell this is a Cosair Eb Alto Horn from searching the internet. It is marked OPUS. I see no other marking on the horn. Please go by the pictures on what I am selling and let me know if I need to modify my description. Looks like the horn is on good playable condition with a mouth pc. There are some small dents which I tried to show in the pics. Please review the pics on what is there and the condition. Feel free to ask questions.  $40 for a flat fee shipping within the Continental US.