So as I browse antique stores, there are a lot of mystery hones, most or which are Arkansas hones/oil stones. What are some characteristics to look for in Charnleys/Eschers/Thuringens? I know every stone is different and what not, but I'm fairly certain I can pick out coticule, and Eschers if they have the characteristic box/colour. But any advice for the other special finishers?
Thanks!