its worth 5 isle of man 1973 gold sovereigns, £277 each on ebay Mar 2012 = £1,385
50 cents
There was no 1977 British One Pound coin minted. The first general circulation One Pound coins was minted in 1983.
Such a coin does not exist. The British One Pound coin was first issued in 1983.
There was no 1811 British Sovereign or One Pound coin minted.
1 pound
Please check your coin. You possibly refer to the 1986 commemorative Two Pound coin.
There was no British 1901 Two Pound or Double Sovereign coin produced.
Such a coin does not exist. The English have never produced a 4 Pound coin.
If it was found in change, the coin is face value. A uncirculated coin is about 25 cents.
Spend it.
72.90
Face value.