Alexander III the Great 336-323 B.C. AE 20 (19.5 mm, 5.74 g). Uncertain mint in Western Asia Minor, ca. 323-310 B.C. Head of Alexander the Great as Hercules right, wearing the lion-skin headdress / ΒΑΣΙΛΕΩΣ, bow in bow-case above and club, the weapons of Hercules; torch in field below. That said, I hadn't noticed the countermark on the reverse from the pics. I thought it was just part of the bow case. Here is a pic of it with the countermark circled: Of course this just makes me more excited about the coin...but what is the CM? I searched AC search and found numerous similar types with CMs, some not even mentioning that the coin has a CM, but no consensus. Here are a few images borrowed from them of the type with CM and a description. (listing says c/m: Head of lion right within incuse circle) (listing says c/m: owl(?) standing right, head facing, within circular incuse) (listing says c/m: uncertain object (possibly horse's head right) within circular incuse) (one without CM) If anyone has any ideas what my countermark might be I'd love to hear those hypothesis. And of course if you have any of these coins I would love to see them or anything else you would like to share!