Early coins often had misspellings because the engravers were not necessarily well-educated in the modern sense, and moreover, English spelling was not yet standardized. The "curency" goof is a recognized variety.
Continental currency is among the most frequently reproduced early coinage. Replicas will have the small word "COPY" worked into the design somewhere to indicate they're a reproduction, while fake ones will not have any special markings. If your coin doesn't have the word COPY on it, you can try dropping it gently. Most but not all fakes will sound clunky while a genuine coin will ring. However, even if it rings it could still be a good counterfeit so it would be best to have it inspected in person.
Only silver coins could be made and was extremely hard to forge a coin.
Gibraltars currency is the Pound Sterling, but they mint their own coins. Gibraltars currency is legal tender only in Gibraltar.
No. Australian currency is legal tender only in Australia and its Territories.
The 5 pence coin is worth only around 8 cents in US currency, or 5 pence in the UK.
The only significant change to the Australian currency in 1984 was the replacement of the One Dollar note with a One Dollar coin.
The only currency that John Adams is on is the 2007 dollar coin. This coin is no longer minted, but is in circulation.
Jersey only ever produced a Five Shilling coin in 1966. The concept of a "Shilling" ceased with the introduction of decimal currency in 1971.
A coin collector would pay more than £5 for the coin, if it was uncirculated and in Mint condition, or a Proof coin. However if you were to go into a bank and exchange the coin for other currency, they would only give you the face value of £5's worth.
The Cyprus Two Shilling coin was only issued in 1947 and 1949 as was the Cyprus Shilling coin. The Shilling coin replaced the 9 Piastre coin and the Two Shilling coin replaced the 18 Piastre coin. Cyprus changed to a decimal currency in 1955. 50 Mils to the Shilling and 1,000 Mils to the Pound.
Coins with the inscription "Ballivie Insvle Degernere" are from the Guernsey. Guernsey currency is only legal tender in Guernsey. British currency is legal tender in Guernsey.
20.00 Mexican Pesos are worth 1.56$ USD or 1.57$ CAD. That being said, there is no international banking exchange of coin currency. Only papered currency. This means that your 20 pesos are only worth that in Mexico!
The Gibraltar Five Pound coins are similar to the British Five Pound coins in that although they are legal tender, the Five Pound coin is not intended to be a circulating coin, but a collectible of a commemorative nature and many businesses are reluctant to accept them. Gibraltar currency is only legal tender in Gibraltar and most authorities advise changing your currency before you depart Gibraltar. If you want to sell your Five Pound coin, take it to a reputable coin dealer.