George McClellan invented the cavalry saddle a lot of them were used during the war between the states on both sides. This saddle is obviously an issued cavalry saddle. I would take it to a professional if I was going to do anything to it. Have to be really careful with leather that old as saddle soap and even mink or neatsfoot oil could potentially break down the fibers. You have a piece of American history there and it is beautiful. Congratulations on a great find.