Ticinum post-reform reform radiate (VOT X)

[Heliodromus]

Nothing special here, but a decent specimen of the type.

This is a post-reform radiate (PRR) for Galerius from Ticinum, RIC VI Ticinum 39b. RIC dates it to c.299 AD. "T" is the officina, not the mint.

There were a few different PRR types, depending on mint. Diocletian's eastern mints mostly issued CONCORDIA MILITVM, while Maximianus' Italian mints instead issued CONCORDIAE AVGG. Apparently following these, Maximianus issued these VOT X, VOT XX types, now including Carthage as well as Italy (Rome, Ticinum).

The Ticinum coins (VOT X, VOT XX) can be distinuigshed from the Rome ones (VOT XX only) based on officina marking. The Ticinum ones use P/S/T, while the Rome ones use A/B/../theta. The Carthage ones are more obvious since they are marked "FK" (FELIX KARTHAGO), such as on my RIC 35a for Constantius I below.

RIC has different dates for the Ticinum and Rome vota types vs the Carthage ones, and I'm not quite sure why. The Ticinum and Rome ones are dated to c.299 AD sequentially following the CONCORDIAE AVGG type (issued shortly after the 294 AD coinage reform that "PRR" refers to), while the Carthage ones are dated to the vicennalia (augusti) and decennalia (caesars) celebrations of 303 AD. It would seem more logical if they were all issued at the same time - is anyone aware of a good argument for the RIC 299 AD vs 303 AD dating ?