Walt (oneminmicro) Ancient Roman Coins Viewed Under a Microscope – Hidden Details Revealed. Posted: 20 May 2025 | Last updated: 30 May 2025. More for You ...

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.

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

As a check, you can divide the number of coins currently in circulation in the world, 1.5 trillion, by the average life of a coin, 25 years, to reach a figure of 60 billion coins minted per annum.

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 ...