10-100 USD or so
Sovereign Holograms are worth around £250.00 pounds because of the design wieght and year .
Modern sovereigns unless in proof condition are generally only worth bullion. At the moment a full sovereign is worth about $400 US/CAD in gold.
$300Billion
no sovereign = £1 only (£1.00) guinea = £1 and 1 Shilling (£1.05)
25-125 usd
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.
R80000.00
'The Red-Headed League' probably took place in 1890, and the gold sovereign was equivalent to 1 British pound at that time, which, in turn, was worth about $4 US. Inflation would make the sovereign's buying power about $100 in today's money.
Any collector value would depend on the year and condition of the coin. At the very least, it will be worth whatever the current price of gold might be. A mint condition Sovereign contains 7.322381 grams of gold. Currently gold is at about $1,790 USD per ounce. That makes the gold content of a Sovereign coin worth about $79 USD.
10-100 usd
Please provide a year. King George III, IV, V and VI have all had Sovereign coins issued with their likeness on them.