I believe that is what is called a "New Model #1" c. 1868-1870 or such. A better photo and S/N would help date and ID it better.
Besides the cylinder, it also looks like it's missing the trigger assembly. I think what you have is a firearm frame with gutta-percha grips, not really a "gun."
Last edited by kamerer; August 18, 2008 at 02:40 AM.