Zero. No Eire (Irish) 10 Pence coin has ever contained any silver, they are made from a copper-nickel alloy.
All Eire (Irish) 50 Pence coins were made from a copper-nickel alloy.
Such a coin does not exist. The Eire (Irish) 10 Pence coin was first introduced into the currency in 1969.
All years of issue of the Eire 20 Pence coin are identical. See the link below.
It is a Woodcock.
There is no silver content in any general circulation British coin from 1947 onwards. The 10 Pence coin is made from 75% copper and 25% nickel.
Zero. There is no silver in any British general circulation 50 Pence coin, and there has been no silver in any British general circulation coin from 1947 onwards.
Eire is the Irish name for Ireland. 5p refers to a 5 Pence coin.
The Eire (Irish) 10 Pence coin was first issued in 1969 and last issued in 2000. It was made from an alloy of 75% copper and 25% nickel.
It contains 0% silver. Yes, that's a zero.
The Eire (Irish) 20 Pence coin minted from 1986 to 2000, is made from a nickel/bronze alloy and are not plated. Any discolouration (browning or yellowing) will most likely be due to light tarnishing of the coin.
Please check that date again. Ireland (Eire in Gaelic) did not use decimal denomination coins until 1970, and in any case, the country was under British rule in 1861 so a coin from that date would not have its inscriptions in Gaelic. Look at the coin again"Eire" is read while it is at the top of the coin. If you rotate the coin so that the numbers are at the top you will see that the date is actually "1981". The Irish (or Eire) 50 Pence coin was not introduced into the currency until 1970.
Such a coin does not exist. Decimal currency was not introduced until 1971, including the 2 Pence coin.