I have what I believe to be an original 1875 Remington but I'm not sure how to really tell. There are no factory markings on it other than a "625" on the bottom of the frame in front of the trigger guard. It appears to be chambered in .45 colt and a loaded .45 colt round fits into the cylinder. It is nickel plated with what appears to be ebony grips and the grip strap has been engraved with a name. I'd say the finish is 90-95%, the barrel is a little shorter than most pictures of this model I've seen, I can't tell if that is original or cut down. Any input is appreciated, I'm interested in how to tell if it's original, and the value. Thanks!