In Roman mythology, Aequitas was the minor goddess of fair trade and honest merchants. Aequitas was also a personification of the virtues equity and fairness of the emperor (Aequitas Augusti). She is depicted with a cornucopia and a balance suggesting Aequitas Augusti is a source of prosperity.
"The scales, that natural emblem of Equity, are used by Persius to express the decision of right and wrong - the cornucopiae signifies the good which results from examining into the real merits of causes" - Smyth.
The epigraph of AEQVITAS (or AEQVITATI) AVG, or AVGVSTI, belongs to the mints of Vitellius, Titus, Domitian, Antoninus Pius, Pertinax, Septimius Severus, Alexander Severus, Macrinus, Maximinus, Gordianus Pius, Volusianus, Macrianus, Quietus.
AEQVITAS PVBLICA, or AEQVITATI PVBLICAE presents itself on medals of Septimius Severus, Julia Domna, Caracalla, Geta, Elagabalus, Gallienus.