World's Greatest Mint Errors Published

The United States Mint produces billions of coins each year. But, on occasion, a coin escapes the Mint that was never intended for general circulation. These most unusual coins, called mint errors, can fetch tens of thousands of dollars from dealers or collectors in the numismatic market.

For anyone interested in learning more about these uncanny mint-made mistakes, World’s Greatest Mint Errors is an enjoyable resource packed full of some of the most dramatic, rare and extraordinary mint errors and die trials ever assembled in one publication.

Hundreds of spectacular mint errors are pictured. Each error coin photo is presented in full color, and enlarged to enhance the smallest details. Some of the error coins featured in this book have never been seen by the public before, and each is described in great detail as to the type of error, the assigned grade, rarity and estimated value.

Also included at the end of most chapters are extensive price charts. This pricing was compiled by leading mint error dealers from within the professional numismatic community and will serve the reader well as a useful guide to mint errors and die trial values.

The information found within these pages will bring anyone interested in mint errors up to date with the latest information on new discoveries, new types of errors and a collection of some of the most dramatic, unique and spectacular mint errors and die trials from the United States and around the world.

Mike Byers Interview

In March of 2009, Jessica Mullenfeld of Zyrus Press conducted an interview with Mike Byers regarding his new book, World’s Greatest Mint Errors. Here it is in it’s entirety:

Q: Who do you think should read this book?

A: This book is accessible to any coin collector or numismatist that is interested in mint errors, regardless of experience. For the advanced collector, there are price guides of each major mint error type. For the beginning collector there are color photos and descriptions of how each mint error type occurs.

Q: All of the demand for coin books seems to be for pricing guides, how will this appeal to those who just want to make money off of their coins?

A: Price guides are included in this book as well as information and photos on the finest known and most valuable mint errors. The prices in the price guides at the end of each chapter reflect the retail value of each mint error type. This is valuable information for collectors who are selling mint errors.

Q: What was the driving force for you to put this book together?

A: I have been a mint error dealer for over thirty years and have handled some of the most spectacular and most valuable mint errors in existence. I wanted to share my experience and information with dealers and collectors. I have also received hundreds of e-mails from collectors and readers of my website and magazine asking if I had a book out, and if so how they could order it. Most were looking for a book with photos, descriptions and price guides for major mint errors, but one did not exist.

Q: Why did you choose mint error coins over all of the other coin collecting types?

A: In my opinion, major mint errors are one of the most fascinating segments of numismatics. They represent mistakes during the minting process and production of coins. Many are unique, rare, dramatic, expensive, famous and are undervalued.

Q: To get to know you more personally, what was the first mint error coin that interested you in this business?

A: I was born in the business and am a third generation coin dealer. I started to attend coin shows with my Dad, at the age of four. I’ll never forget the day when he brought home a sealed canvas bag of 1962 Lincoln Cents for me to open and search. After several hours and blurry vision I found a Lincoln Cent that was struck 50% off-center. I was immediately hooked.

Q: Was there any part of the book that you enjoyed doing the most?

A: I enjoyed reviewing the photos of many dramatic and spectacular mint errors that I have handled over the past thirty years. I also enjoyed researching and assembling the price guide to assist collectors.

Q: There are also extensive price charts at the end of the chapters. Will these prove to be useful reference tools for collectors?

A: This is the first published book of major mint errors that accurately lists the retail values of most types of mint errors. Values are included for early type coins as well as modern types. This price guide is a guide. Prices fluctuate due to the date, grade, eye appeal and how dramatic the striking error is. Rarity is also a factor. The price is sometimes based on the rarity and grade of the type of coin as well as how rare the error is. The price can also vary depending on whether two collectors are bidding for the same rare major mint error. When purchasing a mint error, it is important to use multiple resources to determine value, as there are many mint errors that do not fit into one category.

Q: Some of the error coins featured in this book have never been seen by the public before. Can you give us an example?

A: One example that comes to mind is the unique U.S. Walking Liberty Half struck on a U.S. Steel Cent planchet during World War II. It was authenticated and certified by PCGS as Mint State 64. It is perfectly centered and is breathtaking to see. It is one of the most valuable U.S. mint errors.

Q: What is the key message of what you would like other collectors to take away from this book?

A: I hope to raise interest, awareness and excitement in this fascinating area of numismatics. By sharing valuable information, prices and photos, coin collectors can enjoy and pursue major mint errors as part of their existing collection. New collectors can learn about mint errors and use this book as their guide.

Q: Once this book has reached the readers, what do you hope to receive as far as feedback goes?

A: My goal is to help educate, inform and excite experienced collectors and new beginners about fascinating mint errors that are discovered and treasured. Based on the feedback I have received so far over the last few years with my website and magazine, this book on mint errors will become a useful reference for collectors.

Q: Did a guy like you, who is so deep in the knowledge of mint error coins, learn anything new from doing this book?

A: After five years of compiling this mint error book and after researching the prices and assembling the photos and descriptions of these major mint errors, I’ve realized how truly rare and undervalued major mint errors are in comparison to the prices realized for regular types of U.S. coins.

Q: The book sounds like it will be a great addition for collectors. How can folks get a copy?

A: Zyruss Press is the publisher. They will available to order online at and at

About The Author: Mike Byers

A professional numismatist since 1978, Mike Byers is now the largest dealer of the world’s finest mint errors, die trials and numismatic rarities. His new discoveries of major mint errors have been front page news for years.

Mr. Byers is a life member of the ANA since 1985, a charter member of NGC and a featured dealer/member of PCGS. He is a founding member of the California Coin & Precious Metals Association and a life member of the Central States Numismatic Society, the Florida United Numismatists and a member of ICTA. Mike Byers was a consultant for ANACS for mint errors from 2000 through 2006. When Mike Byers is not at coin conventions buying and selling mint errors he is usually in his office with customers or editing the next issue of his mint error magazine or catalog.

Copyright Ⓒ 2009 All rights reserved. Legal notice.