The primary thrust of my paper is Rockwell Test Marks on planchets.
Because those do not represent tests on the die - they are a test on the planchet - so they are not repeated. Were they on the die, they would be...
Fred Weinberg - thank you. I am very much aware that this is a hard sell. I also am aware of the impossibility of making a definitive attribution....
:yack::yack::woot::woot::dead::dead:
I would be interested in hearing why you have reached this conclusion? I gather you disagree with some of my criteria for identifying RT?
I did show one in the paper I wrote. I make the point that you have emphasized that it is just not possible to say for sure but it is possible to...
Perhaps the question never arose! I appreciate your raising the question here. It made me realize that I did not know the answer and needed to...
The C test is done the same way on dies as with planchents (15T test), but with a different indenter and different pressures.
Rockwell C Scale: Preliminary Force = 98.07N (10 kgf) Total Force = 1471N (150kgf) Rockwell B Scale: Preliminary Force = 98.07N (10 kgf) Total...
Here is copy and paste. I could also forward or send as .pdf to an email address. Here I have blanked out my email. Inquiries...
FYI - I have received a communication from the Mint that Rockwell Hardness Testing (C Scale) is performed by them on production dies.
Fred Weinberg - thanks! Just to clarify...this is not my coin in the photo by the OP. Also very interested to learn the answer to Rockwell...
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