Dupondius - Caligula COL IVL GEM ACCI

Acci — modern Guadix in Granada — was a veteran colony founded by Augustus and populated largely with soldiers from the Legio IV Macedonica and Legio I, which explains the "Gemella" in its name. The city held the right to strike its own colonial bronze, a privilege exercised across the Julio-Claudian period but tied closely to imperial favor. Under Caligula that favor was, at least initially, conspicuous: the senate granted him powers unprecedented in their speed and scope upon his accession in 37 AD.

RPC I 142 is among the heavier colonial bronzes from the Spanish mints, a product of a local weight standard rather than any central directive from Rome.