Ok, now things are making more sense.
It's a gunthat some one used to learn or to demonstrate the abilityto do fancy work. I'd say it's quite a piece. If it could be documented to the point where the craftsman/men were identified and they become collectible, which they may already be, it is a real find.
1 of 25, where are the other 25. A search and acquire would be a good collector's thing. Then when ya got'em all........who knows.
I'd put that thing in a glass case and milk it for all glory possible with friends and neighbors then when the Antiques Road Show comes by your town you could see if you make to a TV spot.