A Sovereign is Sterling coin. In 1880 a Sovereign was worth a Sovereign or One Pound. It's face value has not changed since it was reintroduced into the currency in 1817.
The Royal Mint did not produce a 1919 Half-Sovereign coin.
No. The British gold Guinea coin was a coin with a value of 21 Shillings and was 24mm in diameter. The Guinea was last issued in 1813 and was effectively replaced by the Sovereign. The British 22 carat gold Sovereign coin is a coin with a face value of One Pound (or 20 Shillings) and is 22.05mm in diameter. The modern Sovereign was first issued in 1817.
The Sovereign is a coin, not a value. It does not have a symbol. The value of the Sovereign is One Pound. In the pre-decimal currency, it was also equal to One Pound (or 20 Shillings).
Which country and what coin?
A British Half-Sovereign has a face value of 50 Pence. They are made from 22 carat gold and, since 1980 have been issued as a collector or investment coin issued as either or Proof or bullion coin, or both, their actual value, depending on the year, is more likely to be anything from £140 to £200 GBP. See the link below for a currency conversion.
There was no 1811 British Sovereign or One Pound coin minted.
Such a coin does not exist. The first Quarter-Sovereign coin ever produced by the Royal Mint was minted in 2009.
If you have the Sterling Silver version (says Sterling on the edge) figure roughly the melt value of 1 oz. of silver - $10-$15. ::further contribution:: Actually, the sterling silver Roberts Zodiac coins have no sterling content marking whatsoever. In terms of value, it depends on whether or not you have the mini coin or the large size. The large coin is 7/8 oz silver.
The Royal Mint has never produced a Quarter-Sovereign coin until 2009. There has never been a need for a Quarter-Sovereign coin, since the Crown (Five Shillings) did the job and, after decimalisation, the 25 Pence coin to a lesser extent.
The worth of Longines Symphonette sterling coins will be determined by several factors. The value will be determined by the condition of the coin, the design on the coin and the supply and demand of the coin.
$14.50 on ebay
There was no British 1901 Two Pound or Double Sovereign coin produced.