Oncia Público Deposited
A gold coin of Sicily, notably of Palermo. It was originally equal to the Oncetta of Naples, as is indicated by the value T 30, i.e., thirty Tari, on some of these pieces dated 1793, etc. By the ordinance of April 20, 1818, it was reduced to half the value of the Neapolitan coin. See Ducato.
The Oncia of Malta was a silver coin introduced early in the eighteenth century and was equal to thirty Tari or two Scudi.
- Frey's Dictionary (American Journal of Numismatics, Vol. 50, 1916)