A 5c coin in your wallet could be worth a lot more due to a manufacturing error.
The coin features the late Queen Elizabeth II’s effigy on both sides.
“In 2007, they accidentally produced a 5c piece that had the Queen’s head on both sides,” coin expert David Jobson told 7NEWS.
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“So it’s quite a striking error, and they’re a lot easier to notice in your change.”
Joel Kandiah, who runs a TikTok account called thehistoryofmoney, shared a video featuring the double-headed coin.
He estimated it is worth $2000 to $5000.
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Check your change: The 50c coin that could be worth $15,000
Kandiah also shared details about a number of other notable rare coins.
In 2000, a “mule” coin was released combining the $1 and 10c coins. It can fetch from $300 up to $4000 depending on its quality.
Also in 2000, a 50c coin was minted featuring an incuse flag rather than a relief one. It can be worth from $50 to $1000.
In 1966, a 20c coin with a wavy baseline on the numeral two in the 20 can earn the seller from $200 to $3500.
The $2 red poppy coin, released in 2012, could be worth from $80 up to $280.
This rare 5c coin is valued from $1,000. Credit: Supplied
While society is becoming increasingly cashless, it’s worth taking a look at your coins to see if they’re all they seem to be.
One 50c coin could be worth almost $15,000.
Only two of the coins are known to be in circulation — but more could exist.
According to retailer Downies Collectables — which recently sold one of the rare coins for $14,750 — the 50c coin minted in 1988 with the standard coat of arms on its tail side instead of the special Bicentenary image is “excessively rare” and “eminently historic”.
All 50c coins minted in 1988 were supposed to feature a First Fleet boat and the dates 1788-1988 to celebrate the country’s bicentenary.
At least two coins that are known were instead accidentally printed with the standard coat of arms.
“As is customary, the creation of a special one-year-only 50c commemorative meant that the standard coat of arms 50c was not struck for circulation, and was naturally not included in the proof or mint sets of that year either,” Downies Collectables said.
“Indeed, no 1988 coat of arms 50c coins should exist.”
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