"MIGUEL SANCHEZ Y SANTOS". These revolvers were primarily made in Belgiumicon, Spain, France. This is obviously a Spanish name, but applied with individual handstamps. I would suspect that it is the name of an owner. These large pinfire revolvers were serious firearms in their day; from the late 1850s on. I note that it is missing its ejector rod and loading gate. Should not be difficult to restore these parts if desired. Are there any proof marks?