Two Guineas is a Gold coin first minted in 1664, it had a nominal value of forty Shillings and was originally known as a forty-Shilling piece. It was later called a Double-Guinea, which was then worth forty-two Shillings after the Proclamation of 1717 finally settled the value of a Guinea.
The term "Guinea" indicates the source of the Gold, which came from West Africa. For most of its period of production the coin weighed 16.7 - 16.8 grams and was 31-32 millimetres in diameter, although the coins of Charles II were about 0.1 grams lighter and 1 millimetre smaller. It was last struck in 1753.
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