I have this rough coin that I think is as below. I would appreciate some feedback. Thanks. Thessalonica RIC VI 23a Diocletian AE Follis. 302-303 AD. IMP CC VAL DIOCLETIANVS PF AVG, laureate head right / GENIO POPVLI ROMANI, Genius standing left, holding patera and cornucopiae, Γ right. Mintmark TS Dot.
Under "Thessalonica": AES means bronze. Next are 4 possible obverse inscriptions, one for each Augustus/Caesar Next are 4 sets of different mint/field mark possibilities for that particular reverse inscription/description and the four coins each with those specific mint marks. Your coin has dot TS dot with a Gamma in the right field, so you need to look in the 4th group.