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Message:: [QUOTE="Heliodromus, post: 8078528, member: 120820"]Here's one of those first post-reform GPRs. This is RIC VI Rome 45a for Diocletian from the mint of Rome. Diocletian's coinage reform, as well as introducing the nummus, made the coinage much more consistent across all mints. One of the changes was for all mints to identify their output by including a mintmark with the name of the mint. It seems the intention was for the mintmark to go at the bottom of the coin (in the exergue), but perhaps that wasn't clearly specified since Rome and Siscia instead chose to put it in the field on their initial issues. [ATTACH=full]1402415[/ATTACH] This coin is from Rome, as indicated by the "R" in field. It was actually sold as London, since the seller had only paid attention to the empty exergue! These first issue nummi mostly only indicate the mint, omitting any officina. It seems there must have been a follow-on order to add an officina letter as part of this new cross-mint standardization, since these then appear in subsequent issues. The mints of Antioch and Alexandria differ from the rest in starting production already with an officina, perhaps due to starting production a bit later when this follow-on order had been received.[/QUOTE]