Interesting. Roman Republic Coinage - - 10 Asses = Denarius - 5 Asses = Quinarius - 2.5 Asses = Sestertius - 1 As = 12 Unciae - Semis = 6 Unciae - Triens = 4 Unciae - Quadrans = 3 Unciae - Sextans = 2 Unciae - Uncia - Semuncia = 1/2 Uncia - Quartuncia = 1/4 Uncia DENARIUS = X (ten) The name "Denarius" was a derivative of 10 QUINARIUS = V (five) The name Quinarius was a derivative of 5 SESTERTIUS = SII (2 asses + 1 Semis) The name "Sestertius was a derivative of Semis plus 2. As = Basic Unit SEMIS (Half As) TRIENS (1/3 As) QUADRANS (1/4 As) SEXTANS (1/6 As) UNCIA (1/12 As)
Nice overview Alegandron, might add, The denarius was revalued in 141 BC to 16 asses, shortage of silver ? but soon valued to 10 asses again a couple of years later.