The coin was dipped into acid. That reduced the surface evenly. Note the weaken rim? A real clue that it was dipped into acid. Why is the rim affected more? The acid works on three sides of the coin. Obv/rev/edge all at the same time, thus it reduces the rim quickest.



Edited by coop
09/08/2017 1:09 pm
09/08/2017 1:09 pm






















