: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...
I think Fred is correct, however there are circumstances in which a mark can be identified as "likely". Elsewhere, I have noted the following...
Thank you!
Thank you @masterswimmer. I am thinking that the value in my taking the time to respond in such a way is not necessarily for the OP, but as an...
As I understand, you are saying this is a raised feature. That would indicate an indentation on the die which would certainly be from a Rockwell...
a Kennedy missing dual clad https://sullivannumismatics.com/coin/ngc-50c-1966-kennedy-half-dual-missing-clad-layers-au-55-0
Same coin $100 less https://sullivannumismatics.com/coin/pcgs-10c-1980-p-roosevelt-dime-dual-missing-clad-layer-copper-core-ms-62
https://www.ebay.com/p/1980-P-10C-Roosevelt-Dime/170430067?iid=254093817077&rt=nc
My reference is a post by Sullivan Numismatics Here is another...
Here is a reference by a reputable Error dealer https://forums.collectors.com/discussion/comment/11266774/#Comment_11266774
Here is a reference http://www.error-ref.com/missing-both-clad-layers/ What has not been seen, to my knowledge, is a full weight, fully struck...
Separate names with a comma.
