All British Third Portrait coins (1985 to 1997) depict Queen Elizabeth wearing a necklace.
A year would help.
The larger pre-1998 50 Pence coins were withdrawn from circulation and demonetised in 1998. So, unless they are part of a Proof or uncirculated mint set or are individual Proof or uncirculated coins and in absolute mint condition, they have little or no value.
Value of an 2004 2 pence coin magnetic
The third portrait (Maklouf) of Queen Elizabeth II was used on most British and Commonwealth coins from 1985 to 1997 inclusive. The portrait shows Queen Elizabeth II wearing a necklace.
Such a coin does not exist. Queen Elizabeth II was born in 1926 and did not become queen until 1952. The 20 Pence coin was first issued in 1982.
The "face value" of a coin is whatever is inscribed on it, hence the term "face value". The face value of a 10 Pence coin is 10 Pence.
It's worth exactly 5 pence.
The value of the copper in a 2 Pence coin would be significantly less then 10% of the face value of the coin at the time the coin was minted. Today, it might be a little more, about 0.2 Pence.
Please check your coin. Queen Elizabeth II was born in 1926 and did not become Queen until 1952 after the death of her father, King George VI. The 5 Pence coin was not introduced into the currency until 1968.
Such a coin does not exist. The 10 pence coin was first issued in 1968.
There was no 1974 British 25 Pence coin minted.
There was no 1978 British 25 Pence coin minted.
Such a coin does not exist. The British 50 Pence coin was first issued in 1969.
Such a coin does not exist. The Irish 10 Pence coin was first issued in 1969.