A Guinea.
The coin is a denomination of the old redundant predecimal British currency system and dates back to the time of Charles II.
It had something of a variable value initially, but settled down to the value of £1/1/0d or, One Pound Sterling and one Shilling or, 21 Shillings.
They were first minted in 1663 and last minted in 1813 when they were effectively replaced by the Sovereign (One Pound).
The coin was made from gold and was amongst the first machine produced English coins. The name came from the fact the gold used to manufacture them was mined in Guinea, West Africa.
During their time in the English currency, Guineas were produced in 1/4, 1/3, 1/2, 1, 2 and 5 Guinea denominations.
The British decimal equivalent value of the Guinea is £1.05 (One Pound and five pence).
Some auction houses still use Guineas to price very valuable items such as racehorses, antique furniture and original "old master" paintings.
From a coin collectors perspective, a Guinea coin or its variants, depending on the year, condition and method of minting, could be worth anything from about a hundred to many thousands of Pounds GBP.
Please note that since the Guinea is part of a redundant or obsolete currency, it no longer has an "exchange rate" with other currencies.
h'penny
A florin is another term for a pre-decimal British coin worth two shillings or ten new pence, another term for a guilder, the former currency of the Netherlands, or the currency of Aruba, divided into 100 cents.
A Guinea is a coin of the old pre-decimal British currency. It was worth approximately 21 shillings.
The last British Shilling minted for general circulation was minted in 1966.
The 1942 Florin (two shillings) British coin is struck in 50% pure silver, it is worth about $8-10 US dollars, or about 5-6 British Pounds depending on condition and collector demand.
There was no British 1886 Crown (Five Shillings) coin minted.
There was no British 1846 Crown (Five Shillings) coin issued.
If you refer to any of the currently circulating Shillings such as the Kenyan, Somali, Tanzanian or Ugandan Shillings, take them to a currency exchange office. If you refer to the Shillings of any of the redundant British or British Empire/Commonwealth currencies, take them to a coin dealer.
There were 20 shillings in one pound. It was replaced by the 5p coin.
The was never a British 10 Shilling coin minted. A Half-Sovereign was the equivalent of 10 Shillings.
No they did not. The shilling was a British coin and was introduced centuries after the end of Roman civilisation.
The British Guinea was a gold coin valued at 21 Shillings which was last minted in 1813.
The 100 ptas coin is a Spanish coin. The British Halfcrown coin has a face value of Two Shillings and Sixpence. To get a valuation on either coin, you would need to provide the date and condition of the coin.