Bi-metallic Two Pound coins were not issued into circulation until 1997.
The was a very limited production run in 1994 as a test of the production process and for assessment purposes.
The "centre" is made from 25% nickel and 75% copper, the "outer" ring is made from 76% copper, 20% zinc and 4% nickel.
The reverse inscription reads "ROYAL MINT TRIAL 1994".
The edge inscription reads similarly to the One Pound coin "DECUS ET TUTAMEN ANNO REGNI XLVI", meaning "An ornament and a safeguard - in the 46th year of her reign".
These coins should never have made it outside the Royal Mint. If you have one, you possibly have a coin of some collector value.
Coin catalogues make no mention of it.
A reputable coin dealer may be able to give a valuation.
The mono-metallic Two Pound was produced as usual.
One Pound British in 1860 had the purchasing power of about £63.10 GBP in 2010. This is an approximation based on the value of the pound in 1860 and the value of the pound in 2010, factoring for inflation.
A British Pound in 1799 had the purchasing power of about £62.87 GBP today.
The face value of anything is whatever is written on it. The face value of a Pound, is a Pound. If you want to find out what the current exchange rate in US Dollars is for a British Pound, see the link below.
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The Shilling has always been 1/20th of a British Pound.
There was no 1811 British Sovereign or One Pound coin minted.
The Pound did not exist as a unit of currency in 1469.
It was worth one pound.
There was no British 1901 Two Pound or Double Sovereign coin produced.
The first British Fifty Pound note was issued in 1725.
There were no British Two Pound coins minted from 1888 to 1892 inclusive.
A pound surely!!