I find Rutter in HNItaly convincing for his suggestion of Syracusan influence here.  I also give Crawford’s views below.  I just wonder if Arpi isn’t the inspiration or even the mint location for RRC 15/1.  At very least it shows earlier reception of the Syracusan types among Rome’s allies.

RRC II.714 (Sorda should read Sordi):

CMRR 64:

This is what Sorda says that Crawford dismisses:

Update 12/30/2020:

The follow proposes a radical redating that ignores the hoard evidence and that of the weight standard.

López Sánchez, Fernando. “Numidian kings and Numidian garrisons during the Second Punic War: coins and history.” Potestas 3 (2010): 17-52.