Note 2: In reference to the apparent mis-spelling of GALLIENUS on the obverse: on Forvm, Finn Johannessen suggested: "The celator was probably thinking Greek, engraving the H (ETA) of his mother tongue in lieu of the latin E. When he discovered his mistake he just continued. You find similar errors from Claudius II from the Antioch mint, CONSECP in lieu of CONSECR (Greek RHO for Latin R) and so on. The spellchecker option in the Greek text editor was introduced at a later stage."

An alternative explanation, that the engraver was using AE as an alternative spelling for E, with an open-topped A, is perhaps unlikely from this eastern mint because it is a typically Roman form of spelling. However, other A's on this coin are open-topped, so, whatever the reason for its insertion, the extra letter could as easily be an A as an Eta.