Absolutely incredible camera, of unquestionable historic significance if all of your sources are correct (and I have no reason to assume otherwise). A few ides for you:
Firstly, if you are interested in giving it to a museum, perhaps you could contact a few you think may be interested ( I was also going to suggest the Smithsonian), present them with all of your findings so far (you have kept detailed records, of course) and let them know that you
may be interested in giving it to them. I would imagine that, if they had any interest in an object such as this, they would attempt to verify the origins and use of this camera for themselves. That would certainly help to determine exactly what you have.
My second suggestion is also regarding a PBS show, but a little more in depth than
Antiques Roadshow. There is a show entitled
History Detectives, where people who have what they believe to be rare, historical objects contact the show. The people from the show then do whatever research is necessary to validate this - they will travel to various museums, contact authorities in the suject, etc. in order to determine the tru nature of the given object. It seems to me that what you have here would make an absolutely fascinating epsiode, at the very least, and it is one way that you may be able to learn more about the camera than you could on your own.
Here is a link to the shows website:
http://www.pbs.org/opb/historydetectives/
And here is a link directly to their submission form:
http://www.pbs.org/opb/historydetectives/about/submit.html
Please let us know if you make it on the show!