The portrait on the front (obverse) of the British £1 coin is that of Queen Elizabeth II, as is true of all British Coins since 1953.
The image on the back (reverse) changes every year. Pictures of several of the designs can be found at the Related Link, below.
Such a coin does not exist. The British 50 Pence coin was first issued in 1969.
The coin is called a "50 Pence" coin. The term "50 New Pence" was last used in 1981.
The first British 50 New Pence coin was issued in 1969.
There are 50 British Pence in a British 50p coin.
The British 20 Pence and 50 Pence coins are both heptagons.
The first British 20 Pence coin was issued in 1982.
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.
There was no such coin in Britain. The 50 New Pence coin was introduced in 1969.
Currently, British general circulation currency comes in the following denominations - 1 Penny coin 2 Pence coin 5 Pence coin 10 Pence coin 20 Pence coin 50 Pence coin 1 Pound coin 2 Pound coin 5 Pound note 10 Pound note 20 Pound note 50 Pound note
The geometic term for the shape of a 50 Pence coin is a "Heptagon".
Other than for commemorative 50 Pence coins, Britannia has been on the reverse of the 50 Pence coin since it was first issued in 1969 until 2008 when the new design British coins were issued.
It could be any 50 cent or 50 Pence coin issued since 1953 by any of the 50 plus Commonwealth countries. If the coin has no country name on it, it is most likely a British 50 Pence coin issued between 1969 and now.