That depends on the condition and the denomination.
It would depend on the year and condition of the coin.
the coins is not worth anything but it is a good investment in the futer
An Irish "Millennium" coin, with a face value of one Irish punt (or "pound"), is worth about US$7.50 in Uncirculated condition and about US$8.50 in Proof.
How much is this coin worth
A 1968 10 cent Sampung Sentimos coin is worth about 1 US dollar. This value is based on the assumption that the coin is circulated.
A 1968 Confoederatio Helvetica coin 5 francs is worth between 5 and 20 US dollars. The value depends on the condition of the coin.
I have an Apollo 8 Silver Coin which I purchased in England in 1968. How much is it worth?
Ireland does not use the dollar and never has, so there is no such thing as an Irish 1 dollar coin. Ireland was using the pound in 1952, but there was no 1 pound coin. So whatever coin you have, cannot be either an Irish one dollar coin nor an Irish one pound coin from 1952.
If you got in change spend it, in 1968 the only mint marks used were D & S a coin without a mint mark was struck in Philadelphia.
No, a copy is not worth anything to a collector.
Their still in circulation, the coin is worth 10 cents.
It is not a U.S. Mint issued coin.