Quinarius

The quinarius (plural: quinarii[1]) was a small silver Roman coin valued at half a denarius.

The quinarius was struck for a few years, along with the silver sestertius, following the introduction of the denarius in 211 BC.

The coin was reintroduced in 101 BC as a replacement for the victoriatus, this time valued at 8 asses due to retariffing of the denarius to 16 asses in 118 BC.

For a few years following its reintroduction, large quantities of quinarii were produced, mostly for circulation in Gaul.

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A quinarius of 90 BC of L. Calpurnius Piso Frugi: Obv.: head of Roma right in a winged helmetq; V (asses) for quinarius. Rev.: Dioscuri riding right, stars above heads; ROMA below.
Æ quinarius of Allectus , Camulodunum (Colchester) mint. Obv.: IMP C ALLECTVS P F AVG, radiate, cuirassed bust right. Rev.: VIRTVS AVG, galley rowing left; QC in exergue.