A work in progress - comments/feedback welcomed and appreciated! THREE BASIC DIE EVENT EXPRESSIONS – A PRELIMINARY STUDY SUMMARY Previously [...
https://coinweek.com/transitioning-curvatures-of-2026-p-dime-coin-dies-how-the-2026-p-emerging-liberty-dime-could-signal-a-new-era-in-u-s-mint-die-...
It is apparent that the 2026-P Dimes exhibit a number of minor die cracks, breaks, and ripples concentrated in the area below the base of Lady...
This article is background information for an article in progress that will discuss the interplay between die curvature transitions and relief...
Mike Byers Book “World's Greatest Mint Errors” Is now available online. The book received the NLG (Numismatic Library Guild) Award: Best World...
I Offer an explanation here: https://coinweek.com/philadelphia-mint-errors-why-they-outnumber-denver-varieties/
FEEDER MECHANISM DIE DAMAGE PATTERNS: 2018 TO PRESENT I have been studying Feeder Mechanism Die Damage Patterns and the types of Feeder...
FEEDER MECHANISM DIE DAMAGE PATTERNS ≈1990 to 2018 I have been studying Feeder Mechanism Die Damage Patterns and the types of Feeder Mechanisms...
Something vanished from the United States Mint sometime between 2008 and 2022. No announcement was made. No one seems to have noticed....
FEEDER MECHANISM DIE DAMAGE PATTERNS 1945 to ≈1990 I have been studying Feeder Mechanism Die Damage Patterns and the types of Feeder Mechanisms...
I have been studying Feeder Mechanism Die Damage Patterns and the types of Feeder Mechanisms in use at the US Mint in different time periods. Many...
I have been working on recording specifications of retired coin dies in a spreadsheet. These specifications are obtained from Certificates of...
A REVIEW OF DIE CURVATURE AT THE US MINT SYNOPSIS Throughout a significant portion of the history of coinage die design at the US Mint, the die...
A Master Hub Mystery The Case Of The Missing Master Hub Some Answers I express my gratitude to all who have contributed to a discussion about...
I am undertaking a research project and I am searching for attributed examples of Master Die Doubling. Can anyone help me by providing links? My...
I have been studying plating dynamics for copper-plated zinc cents. I summarized some of my findings in a paper titled PLATING SURFACE...
I have been researching plating issues on Copper Plated Zinc Cents. The information I have found has been both interesting and challenging. My...
This looks like a DDO to me? Split serifs on the 4s with wide right crossbars.[ATTACH] [ATTACH] [ATTACH] [ATTACH]
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