I got this Rogers & Spencer .54(?) caliber blackpowder revolver from my grandmother. Supposedly her great-great grandfather used it while in a calvary regiment from New York in the Civil War. Only 4,400 were made during the war. It's a early production with all the serials matching and being in the 700s. Unfortunately it is no longer functional, the loading arm is gone and the trigger doesn't work.
Plus there's a stamp on the left grip at the bottom, possibly initials?
The Rogers & Spencer revolvers were .457 caliber. They were delivered too late and the war ended. There are no records showing any of the R&S handguns every went to war.
The Government sold them as salvage to Francis Bannerman Co. Blue Point, Ny. Banner sold them for a few dollars as Civil War surplus. It is too bad they were the best precussion revolvers ever made.