CARIA Euippe Hadrian, Artemis statue Reference. RPC III -; apparently unpublished; uncertain c/m within incuse circle. Obv. [ ] AΔPIANOC [ ]? Laureate and cuirassed bust of Hadrian, right, with a radiated head right facing on Hadrian his bust Rev. ЄVIΠΠЄΩN Facing statue of Artemis Ephesia, with supports; to inner left and right, stag standing outward, facing 19.82 gr 31 mm Who can see something in the C/M ?
Nice coin, Okidoki. I just started collecting ancient countermarks recently and I am afraid this one stumps me - but again, I am just beginning. Whenever I get a countermark I can't identify (which is about all of them, at first), I look over this page from FORVM, which has a lot of examples, with good photos and lots of information. I've figured out several of mine from this page. http://www.forumancientcoins.com/gallery/thumbnails.php?album=546 The problem I am having is that I can't even tell what your countermark is, which makes it harder to search. It seems the host coins often got the same kind of countermarks, so you might try searching the host and hope you hit a countermarked example. Good luck!
Perhaps an E or Σ? I don't see any countermarks listed for this city in Howgego but there are some E in large circular punches for the general vicinity. Maybe it is a denomination mark?
i had this reply in FORVM http://www.forumancientcoins.com/gallery/displayimage.php?pos=-9695 AΔP=ADR