TL;DR: Both are AI-powered coin identifier apps available on iOS and Android. CoinKnow (by SenseWake Limited) leads on U.S.

Wrong planchet errors represent some of the most dramatic minting mistakes possible. Wrong planchet and off-metal errors occur when a correctly made blank from one denomination is accidentaly fed into ...

Add Yahoo as a preferred source to see more of our stories on Google. Peter Gudella via Shutterstock Minting coins isn't exactly an exact science. Even though most ...

6. The Proof Coin Pops Finally, we have the proof coin errors. Proof coins are typically struck for collectors, and they usually have a mirror-like finish. But sometimes, these coins can have ...

The 1990 penny error coins represent some of the most exciting finds for modern coin collectors. This year marked a significant transition in U.S. Mint production ...

As with just about any asset, a coin's value is determined by its market demand. This means that coins in short supply often see higher demand — and higher values. With coins, supplies are limited ...

Two rare £2 coins with minting errors are circulating in the UK and could be worth hundreds of pounds ...

The scarcity of the pieces means collectors are willing to pay for them A RARE £2 coin could fetch a staggering £1,000 if you spot a tiny but crucial mistake. A coin expert has revealed the exact ...