One pound.
The Falkland Islands currency (FKP) is pegged at par with the British Pound Sterling (GBP) and the Falkland Islands decimal coinage is near identical in dimensions and composition to the equivalent British Coins. Falkland Island currency is "legal tender" only in the Falkland Islands.
A Falkland Islands 1986 silver 25 Pound coin (QE II)(Prince Andrew's Wedding)(Proof), uncirculated and in absolute mint condition and original packaging, could fetch up to £80 GBP. A reputable coin dealer will be able to give a more accurate valuation.
There is a one pound coin and a two pound coin but not a three pound coin.
As I type this the value of 1 pound of gold is $18,040.00
The 1983 One Pound coin was the year of first issue for the British One Pound coin which replaced the One Pound note. The British One Pound coin is legal tender anywhere in the United Kingdom and some of its dependencies.
The British One Pound coin is round.
Ireland does not use the dollar and never has, so there is no such thing as an Irish 1 dollar coin. Ireland was using the pound in 1952, but there was no 1 pound coin. So whatever coin you have, cannot be either an Irish one dollar coin nor an Irish one pound coin from 1952.
Such a coin does not exist. The British One Pound coin was first issued in 1983.
The coin you describe is a Gibraltar One Pound coin commemorating the discovery of a Neanderthal skull in 1848. They were the standard issue One Pound coin in Gibraltar for a number of years.
310$
There was no 1811 British Sovereign or One Pound coin minted.
The British decimal One Pound (nickel brass) coin was first issued in 1983. A gold One Pound coin was issued from about 1489 until 1604.
There was no 1977 British One Pound coin minted. The first general circulation One Pound coins was minted in 1983.