Brits are being urged to examine their £1 coins with a keen eye for a tiny error that might boost their value immensely. At ...

They examined all four coins under a powerful microscope and confirmed in the journal, PLOS 1,, external that there really were scratches, ...

The microscope makes images out of 4,000 very detailed separate exposures. It takes three days of processing to convert them into a single image. Photo: Martin John Callanan ...

The collector said you will likely need to use a microscope to properly see the date - as it is incredibly small. "You can see here the date 2017 in micro-lettering on every side," he said.

"One of the most fascinating modern £1 coin errors to look out for, the 2016 coin with a micro engraving that actually says '2017'," he explained. "At first glance everything looks perfectly normal.

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