Experimental , large size, volcanic style pistol

Experimental , large size, volcanic style pistol . Overall length is 13 inch or 33 cm.  No markings at all. 

The part under the barre moves forward and permits you to load it, the magazine is visible on the left side of the butt. Seems to be a caliber 44 and rimfire, I have not tested it and do not know if it takes rimfire or rocket ball ammo, like the Volcanic, looking at it, I presume probably the Volcanic ammo.  

The rosewood grips are definetely Us made, and the whole arm breaths 'US made' and it is old,  Works excellent, is professionally made, shinehy bore showing lift rifling.  This one needs research and could be a truly valuable pistol. 

Comes in a contemporary case with holster and some accouterments.