In 2009 the PNG government said it would buy back all the K1 old coins (for 1K). Looks like the K1 hasn't gone up in value. I have one of the coins.
Quote "Mr Kamit stated the bank would pay K1 for every old coin that they received."
Papua New Guinea's currency is Kina, one US dollar is approximately three Kina.
Japan (the 5 yen coin) Papua New Guinea (One Kina)
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.
Please check your coin. The last British Guinea or any of the fractional Guinea coins was issued in 1813.
There were no British 1975 25 Pence coins issued.
Face value only
Such a coin does not exist. The Australian Two Dollar coin was first issued in 1988.
A 1975 Balboa gold coin has different values depending on its denomination and condition. A Panama 100 coin is worth about $300, and a coin with a denomination of 500 can be worth over $2,000.
All that description gives is that the coin is Swiss. Without knowing the denomination, a specific value can't be given.
There is no record of a 1710 Queen Anne Two Guinea coin having been minted. If there had been, the collector value would have been lost due to the piercing, but at the least, it would be worth the bullion value of the gold.
25 cents
Guinea - British coin - was created in 1663.