USA

Stefan Proynov: Majestic Mint Error!  Wow, how amazing is this? Rarely are off center errors seen in the Standing Liberty quarter series and this coin is WAY off center! This...

Stefan Proynov: Spectacular 1794 Doublestrike! ⚡⚡ There are no rarity ratings available for error half cents, but this coin is certainly rare! A normally struck 1794 B-2b half cent...

Mind-Boggling MS66 Error! Early error coins are scarce in general, but this coin is incredible. This piece ranks among the most amazing half cents of the 1790s that we...

Stefan Proynov mint error expert for your attention an American coin in the highest quality MS70. We see it turned on the reverse side of the coin. This is a...

Stefan Proynov: Erroneous coins gain more and more numismatic value, and the bigger the mistakes, the higher their price. The truth is that each errant coin is unique in...

Mint error coins. To your attention a coin that is wrong one cent since 1965. The coin has a large circulation and is heavily crushed on the front. This defect...