I hope you can find them! I am especially interested in the information on the COAs!
@BuffaloHunter PERFECT! Thank you! I will record this!
I check eBay offerings daily for Dies with COAs. You are correct, dwhiz! they appear frequently! Your dies are most interesting! These are the...
Thank you! I do think Encased Coins are interesting! A sample COA of the type I am looking for may be seen in the link.
I have been working on recording specifications of retired coin dies in a spreadsheet. These specifications are obtained from Certificates of...
Heavymetal, I may use you photo for educational purposes. If I do, I will give you credit.
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/
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