Incus -In the field of a coin, is a mark of the monetal triumvirs, designed to shew either the instrument or office of the mint, or the power of striking money. It is seen on coins of the Annia, Claudia, Livineia, Naevia, Rubellia, Silia, Statilia, Valeria, and other families. So on denarii of Claudia, Livineia, and Statilia families, the incus, as a mint mark, is seen opposite the letters III VIR AAA PF added to their surnames PVLCHER TAVRVS REGVLVS. -On a denarius of the Carisia family we see all the tools used in the Roman process of coinage, namely, the incus, or anvil; the forceps, or tongs; and the malleus, or hammer.
Note: The above families did not directly mint coins, but caused them to be minted as government authorities. The reference dates to when tracking the gens and familia was of highest importance to numismatists.