@Clavdivs, what leaps out at me from this is the rendering of 'A' as 'H,' as in, 'VICTORIH HVG.' I've never seen that on a Roman inscription before, from any time, or in any medium. Do you, or, Thank you, Anyone know of any precedent? This is compelling from here because it evokes similar lettering conventions in medieval coins, esp. c. 11th-12th centuries. Specifically for the legends, were the engravers already using punches, as they notoriously did later? ...Hypothetically, that could cover some distance in accounting for the phenomenon.
Yes it is interesting, however I have nothing to add to it from my limited experience. There is another, lesser offering at the same auction, estimated at a mere 15,000 GBP, in which the engraver uses similar strokes but the angle gives us more of what we would expect. This minted in Siscia, the former in Rome. Perhaps someone more experienced has an opinion? https://www.biddr.com/auctions/romanumismatics/browse?a=1300&l=1377409
...And @hotwheelsearl and @singig, it's sounding as if this could easily be reducible to different, as @Clavdivs notes, regional engraving styles, rather than a major shift in the technology per se. ...Hmmm... some stuff here to chew on, until someone tells us more.
Here’s some “H” looking A‘s: cyzicus: Thessalonica: antioch?? heraclea: I do not know whether this is an eastern thing, or a contemporary stylistic thing
Here's one. The alternating bright silvering and dark bronze make this one a monster to photograph (I had to revert to the seller's photo as mine was so bad). Although from Gallienus' sole reign... and not itself a nice coin, it does have a nice depiction of him for the time. I've had this coin since 2017 but have yet to figure out if it's one of 3 similar coins minted in Rome, Milan or Siscia... so this one is to me unattributed.