I have a drachma (NOT a tetradrachma) of Alexander the Great. It weighs in at 4.22 grams. I know these coins were issued after his death and in any number of mints. I wonder if some posters well versed in these coins could take a look at this enlarged image of the drachma. You will see a tiny human figure at the bottom and a horse or Pegasus at about eight o'clock and, of course, the eagle in the hand of Zeus. The surface in spots on the reverse is a bit rough and you can see where I removed some encrustations with baking soda paste and wooden toothpick. Can it be dated to the reign of Alexander or not, and the mint? Thanks for any assistance.