Retired butcher Roy Page, 69, of Coedpoeth, found the detailed 2,000-year-old coin on a farm near St Asaph when he went on a search there with the Mold-based Historical Search Society earlier this year.
See also>> Metal detecting pensioner finds Wales' oldest coinRoy gave the tiny silver coin, which depicts two horses being driven by a man on a chariot, to the Portable Antiquities Scheme (PAS), who have recently confirmed the specific date that it was made.
It is believed to have been brought over some time after the Roman invasion of Britain in 43 AD, or during earlier visits in the first century BC.
Roy said: "The PAS have now told me the date that the coin would have been used is about 150 BC, which I was really pleased about.
"I don't want to sell it because it is a piece of history and I am going to keep hold of it."
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