It is not known.
2018
it was made by a person
It is not known.
Several Roman senators get the credit for being the first, but they probably werent.
The British 20 Pence coin was first released in 1982.
a Roman coin
That is a very tough question to answer. There are several denominations of Roman bronze coins, so for that, I would need more information on the coin.
See: Roman currency
The Australian One Dollar coin was first issued in 1984. The Australian Two Dollar coin was first issued in 1988.
A 10 New Pence coin was a British coin released as a part of the first phase of the conversion to decimal currency in 1968. It replaced the Florin or Two Shilling coin.
There was no such thing as a 60 asses coin. The most valuable Roman coin in 211 BC was the denarius, which was worth 10 asses.