FEEDER MECHANISM DIE DAMAGE PATTERNS ≈1990 to 2018

FEEDER MECHANISM DIE DAMAGE PATTERNS ≈1990 to 2018

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 folks have contributed to my efforts by providing photos of Die Damage for me to include in my Census. I make educational use of some of these photos with credit. I thank everyone for this support and for your insight, advice, and encouragement!

I have prepared a series of articles in which I have attempted to organize and summarize my findings into an easy-to-use reference so that the most likely Feeder Mechanism causing a certain die damage pattern may be identified. The information is divided by time periods:


· 1896 to 1945 in COINWEEK 2/19/2026

https://coinweek.com/feeder-mechanisms-and-die-damage-patterns-1896-1945/

· 1945 to ≈1990 COINWEEK 3/10/2026

https://coinweek.com/feeder-mechanisms-and-die-damage-patterns-1945-%e2%89%881990/

· ≈1990 to 2018

· 2018 to present



The current article in the series for • ≈1990 to 2018 may be found here:

COINWEEK 4/2/2026

https://coinweek.com/feeder-mechani...-1990-2018-a-diagnostic-guide-for-collectors/



This is a highly condensed summary of a small section of the research I have been pursuing, periodically, for the last 2+ years.

 

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Very nice presentation. I have looked at a lot of Lincoln cents, and I can recognize some of the different marks on them. It is interesting to see them change.
I will be prone to scutinize Linear Plating Blister differently now.

 

Thank you!

I would expect most linear plating blisters to have a rounded profile in cross section compared to feeder scrapes which should show a more squared/rectangular cross-sectional profile. Let me know what you are finding!

 

I sure wish @Electron John could've stuck around. He would've been able to get you a good profile comparison.

 

That would be nice to have freely available!

 

I've got some pretty esoteric gear around the house at this point, but I don't have an electron microscope, and it's pretty far down on the priority list.