Quadrans Acilii: Marcus Acilius Marci Filius, / M•ACILI ROMA

The Acilii Glabriones were a plebeian gens that punched well above their political weight in the late Republic, and the moneyer responsible for this issue almost certainly belongs to the same family line that produced Manius Acilius Glabrio — the consul who defeated Antiochus III at Thermopylae in 191 BC. Moneyers of this period routinely leveraged ancestral military glory as implicit credential, and the family name alone carried weight in the voting assemblies.

The quadrans was the smallest fractional denomination in regular bronze coinage, worth one quarter of an as. By the late second century BC, bronze fractions were already losing ground to the expanding silver economy, and surviving quadrantes from this period show comparatively light circulation — the denomination was fading from practical use even as it was being struck.