Tag: NGC gave one of their highest grades to a 1962 Bulgarian 1 Lev coin and it turned out to be a MINT ERROR.

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Stefan Proynov: Denver mistake for a million dollars!

Stefan Proynov: We will call this coin the Denver Million Dollar Error because the coin is extremely rare minted with a wheat grade on...

Stefan Proynov:No Date 5C With Cents, Liberty Nickel — Struck 45% Off Center

No Date 5C With Cents, Liberty Nickel — Struck 45% Off Center — AU55 NGC. Stefan Proynov Mint Error coins consultant for Europe My estimated price...

Stefan Proynov: Struck 20% Off Center — VF35

(1865-1889) 3CN Three Cent Nickel — Struck 20% Off Center — VF35 NGC. Stefan Proynov Mint Error coins consultant for Europe My estimated price for this...

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Stefan Proynov: A unique wrong coin

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...

Majestic Mint Error!

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

1985 India 10 Paise issued by NGC Mint Error MS 65.

1985 India 10 Paise issued by NGC Mint Error MS 65. Mint errors are among the most popular segments of numismatics. Every year, mints for major...