Crawford called the object in Roma’s left hand on this coin a fasces. This doesn’t make a huge amount of sense as one doesn’t carry fasces in the crook of one’s arm, but instead with the axe high over one’s shoulder. The classic example is the Brutus coin (RRC 433/1). Moreover the republican coin series has a pretty definite iconography of what fasces should look like on a coin and specimens of RRC 403/1 just don’t fit the type. The long stick may well be a scepter. This would make some sense, if one agrees that those fillets off Roma’s head indicate she’s wearing a diadem. The diadem and the scepter probably deserve a post of their own, exploring particularly the appropriation of Hellenistic regal iconography for the personification of Roma. Alternatively, the fillets may be only the fillets of a victory crown without any regal connotations. For now, however, I’m just concerned with the little blob circled in red above.
This is likely to be a parazonium. What, one might ask, is a parazonium? Well, besides being a numismatic term for iconography better known from the imperial period, it is a dagger or short sword worn on the left hand side off the girdle. Our only literary testimony is Martial Epigrams 14.32:
The word itself is derived from the Greek, although it is pretty rare in Greek texts as well: in the TLG it shows up only in a fifth century CE lexicon and one equally late hagiography. I don’t think this type is our earliest examples of Roma with a parazonium; it’s already part of her iconography on RRC 335/1 (one example, another example) and probably also on RRC 391/3. What this type does do nicely is suggest that the parazonium is already perhaps a linking piece of iconography between virtus and Roma. On the imperial coinage by the time of Nero the parazonium is a common attribute for reverse personifications of virtus.