What is This Old Conn Horn?

I have come across a Conn double horn with serial number 346249. According to the serial number it is from 1941, however I don't know what model it is. It cost $100 to buy, and came in a Conn case that looks like it might be the original. What do you think it is, and how much is it worth? Pictures are attached.

Thanks for your help.
Joel Livsey

6d? I think you got a good deal. Hard to say how much it is worth , depends on condition. Are the valves and slides free. I' ll give you $ 200.00 for it. Russell

Sorry to disappoint you, but I put it on Ebay last night and it already sold.

Joel,I was halfway joking but I would have given you $200. If I may ask , how much did you get for it? I have know several people who played 6 DSO. Russell

I'm rather shocked at how it sold. I put it on for $900 or best offer, and someone bought it for that price within 12 hours.