Discover rare 1990 penny errors, their values, and how apps like CoinKnow help identify valuable coins instantly.

The 2003 Nickel Error List contains some of the most sought-after minting mistakes that collectors actively hunt for today. These errors can transform a five-cent coin into a valuable treasure worth ...

Turns out these common minting mistakes from 1979 are worth up to $5,000 - and you might have one sitting in your change jar ...

Explore the 1967 quarter error list, including DDO, DDR, off-center, wrong planchet, and rare silver errors, plus values and identification tips for collectors.

Collectors have long known that small minting mistakes can turn pocket change into serious money, and the 1983 Washington quarter is one of the clearest examples. A spectacular error from that year, ...

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 ...

Explore the most valuable 1970 quarter errors, including overstrikes, doubled dies, off-center strikes, and wrong planchet coins. Learn how to identify each variety and see current value ranges for ...

There's something to be said for collecting old coins. Some people do it for the fun of it or to have a cool story to tell.

The 1980 penny error coins represent some of the most exciting finds for collectors searching through pocket change. With ...