I was at a event today that was all pre 1840 stuff. I bought a few items for my muzzleloader from a vendor. He had on the table a few locks and parts. The one lock had tower stamped on it so I know what it's supposed to be. Is there any way to tell if it is real or more modern copy? It looked old but in good shape but that doesn't really mean that it wasn't made to look old. I may go again tomorrow to do a closer inspection of it. I don't remember the price he had on it so I'm not sure my budget will support it.