It has been in our pockets and purses for more than three decades but from midnight on Sunday the 'round' pound will no longer be legal tender.
But while the old coins may not not be accepted in the shops, you can bring any you find down the back of the sofa into any bank, building society, or post office to get them changed.
Sarah Clarke reports.
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The new pound coin has been hailed as a the most secure form of currency in the world, with no evidence it can be faked.
Exchequer Secretary to the Treasury Andrew Jones was speaking during a visit to a high-security coin storage facility in Belfast.
There are now more of the new 12-sided coins in circulation than the old ones, which will cease to be legal tender on 15 October.
Mr Jones urged people to bank, spend or donate them before the deadline.
He said: "To have more new coins in circulation than old at this point is great news - however, with less than 100 days to go, the clock is ticking."
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