Up until a few years ago, most of my working day consisted of examining coins using a stereo microscope. Many things I saw have not been shared publicly as there was confirmation that counterfeiters were using authentication information to improve their fakes. There was much to discover and record as the microscope expanded what we could see. For instance, would you believe that Mint engravers put "secret marks" on many hubs and dies to deter counterfeiters? I do. It would be interesting to be able to go back in time and learn about this practice.
Read article: Did U.S. Mint Put Secret Marks on Its Coins? - NumisMaster
Related posts:
