I Have this very old hone which has obviously been in this old wooden box all of it's life. It was grungy and black as I received it. I flattened it on a worn DMT and it cleaned up to be light brown in color. I tried to get good pics as best I could. Would any of you hone guys have an idea what it is? It was not dished out, so I think it might be a razor hone. It is super hard and fine. Thanks for the help!:)