I'm hoping this forum might offer up some info on this Gatling Gun I just purchased. I've had a lot of difficulty finding any info on it. It is 17" long, made of heavy brass and steel. The maker is Thunder Valley Machine of Ohio. The previous owner, who purchased it used about 12 years ago, said he only fired blank rounds through it, but he believes it can fire actual .22 rounds. An engraved badge reads "Gatling Gun -1862" on the top. Anybody know anything at all about this fellow - when it was made, what the proper ammunition it can fire is, what its value is, etc? Any help would be greatly appreciated!