I recently purchased the following coin:

Basic info on the coin: Thessalonica, AE24 of Gordian III, reverse showing agonistic urn of Pythian Games, inscribed "PVThIA" (although all the letters except "A" have worn off my example). Reverse legend "ThESSALONEIKEWN NEWKOR".
My question is on the interpretation and translation of the obverse legend. As near as I can make out, it reads "AVT K EMATNOC GORDIANOC". Most of the other Roman Provincial coins of Gordian III have some variant of "AVT KAI MAR ANTWN GORDIANOC", and I just can't make EMATNOC fit into that... unless there was a die-cutter in Thessalonica who was a really bad speller.
Some of those letters could be interpreted differently, but I'm wondering if anyone knows exactly what "EMATNOC" means or stands for.
For different views of the lettering in question,
here are the seller's pics of my coin, and
here is one on CoinArchives that seems to be a similar type, with the same obverse legend and clearer lettering. For comparison,
this one is more or less identical to mine but has the more orthodox AV K M ANTWN GORDIANOC legend.
I even thought it might actually be a coin of Gordian I or II, but they don't have any names I could find that fitted that, either.
Any ideas or opinions welcome. Also, if anyone can verify, correct or expand upon the dealer's attribution of mine as "Lindgren 1240var (without branch), BMC 128v", that would be appreciated, too.
Don't say "infinitely" when you mean "very"; otherwise, you'll have no word left when you want to talk about something really infinite. - C. S. Lewis