Thanks for the link! I see the discussion about different radii, and took it to mean different from each other rather than internally different. I...
Thanks for commenting! I would be interested in your sources for this information?
Thank you for commenting! Correct! Note that may illustration diagram is for radius, not diameter.
An explanation of the difference between “Spherical” and Exponential Curvature: This image is an imaginary cross section of the possible...
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...
Very well stated! We seem to be focusing on features today that, in many instances, are smaller than my calipers are able to measure! That means...
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...
Thanks for helping!
Thank you!
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...
The cause is scraped up metal from the action of feeder finger die scrapes. This scraped up metal may appear randomly anywhere on the design....
More specifically, I think the larger area on your coin is what has been named "feeder-linked struck through." The cause is scraped up metal from...
The area shows scrapes at the same angle as NE of the shield. It is more common with Schuler horizontal stroke presses for additional gouged areas...
https://www.error-ref.com/radial-flow-lines/
Weight of your 1944?
2018 would be the first year a Dial Feeder was used on the Schuler Press.
The term for the deeper, wider area is "Feeder-applied struck-through" The feeder scrapes on the die end up leaving piled up shaving on the die...
Thanks for letting us know! I appreciate following your progression in finding a good descriptive name for: "Feeder-applied struck-through errors"
STRIKE EFFECTS UPDATE In a discussion of the existence of ridges and valleys forming a corrugated type surface on the fields of copper plated...
Agree! I appreciate the support and encouragement given to me by Ken and I value the collaboration and also having this piece in my collection!
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