Good one! Their origin is debatable (cutting of die steel, trimming rotating bar stock, machining die stock before hubbing, inadequate polishing...
[ATTACH] The dies are canceled. There is no image left. [ATTACH] This is a rare die with a collar clash that did not get obliterated by the...
I see frequent sales on eBay and I will attempt to buy if there is some unusual characteristic and it is not a budget-buster.
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...
The first Schuler Presses arrived at the mint before October, 1987 and most likely operated with a Pusher Feeding Mechanism, since Schuler was not...
In the spreadsheet, a large number of dies were retired with less than 500,000 strikes! I own a die that was retired after 109 strikes! [ATTACH]
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!
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