A British sterling silver Double Florin (Four Shillings), was only issued from 1887 to 1890 and abandoned possibly due to its size and weight.
A British sterling silver Double Florin (Four Shillings)(Victoria)(depending on the year), uncirculated and in absolute mint condition could fetch up to £130 GBP. If it has been circulated but still in good condition, it might fetch up to £12 to £60 GBP.
A reputable coin dealer will be able to give a more accurate valuation.
There were 188,000 1932 Australian Florins minted.
We will probably never know. That type of error might have been noticed after the first day of minting. There were a total of 243,340 1888 Double-Florins minted.
In 1878, the British minted many different types of silver coin including Crowns, Halfcrowns, Florins, Shillings, Sixpences, Threepences, some with variations, and the Maundy coins. Please be a little more specific.
There were 654,564,000 British 1967 Pennies minted.
British 1875 Farthings minted at the Royal Mint (no mintmark) - 712,760 minted. British 1875 Farthings minted at the Heaton Mint (mintmark = H) - 6,092,800 minted.
Florins are no longer circulated but were worth the equivalent of 24 British pennies - 100 equal 1 British pound. The exchange rate varies so need to check with a bank or two.
There were 1,710,946 1892 British Halfcrown coins minted.
There was a total of 30,044,000 1911 British Sovereigns minted for circulation.
There were 26,977,000 British 1902 Pennies minted.
There were 29,098,000 1930 British Pennies minted.
There were 154,296,000 King George V 1936 British Pennies minted. There were no 1936 King Edward VIII British coins minted since he abdicated before the coins could be prepared.
There were 2.95 million 1982 British "Uncirculated" Sovereigns minted. There were 20,000 1982 British "Proof FDC" Sovereigns minted.