These coins are still potentially in circulation 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 are worth 20 Pence in Gibraltar.
The Gibraltar currency (GIP) is pegged at par with the British Pound Sterling (GBP) and the Gibraltar decimal coinage is identical in dimensions and composition to the equivalent British Coins, being struck on the same blanks. Gibraltar currency is "legal tender" only in Gibraltar.
Value of an 2004 2 pence coin magnetic
It is in common circulation and worth 2 British Pence, or about 3 cents US/Canadian. It is a common coin and worth no more than face value.
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.
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.
There was no 1974 British 25 Pence coin minted.
Such a coin does not exist. The 10 pence coin was first issued in 1968.
There was no 1978 British 25 Pence coin minted.
Such a coin does not exist. The Irish 10 Pence coin was first issued in 1969.
Such a coin does not exist. The British 50 Pence coin was first issued in 1969.
If you have a 5 Pence coin that is the same diameter as a 1988 10 Pence coin, yes, it is rare. The largest 5 Pence coin was 1.5 mm smaller than the smallest 10 Pence coin. You may have a 5 Pence coin struck on a 10 Pence blank. Any coin with a "genuine" minting flaw would have some value, above the usual, as a collectible coin. Genuinely flawed coins are not necessarily known about or documented until somebody turns up with one, since they are an "accident" of the minting process, and have escaped detection during quality control at the mint therefore, a valuation cannot be anticipated. A reputable coin dealer should be able to identify and confirm the coin as genuine and make a valuation.
The British 20 Pence coin was first released in 1982.
Such a coin does not exist. The Royal Australian Mint has never produced a Two Pence coin.