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2019 P Washington Quarter Rockwell Hardness Test?

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Daves Errors's Avatar
United States
1566 Posts
 Posted 04/14/2019  04:45 am  Show Profile   Bookmark this reply Add Daves Errors to your friends list Get a Link to this Reply
levelsofmadness: just posted a 2019 Quarter asking the same as me about the test mark.>>>Funny his mark on a 2019 looks the SAME as the ones on my 1956 coin HUMMMMMMMM..ODD thats a lot of years apart to show up with the same mark.
Valued Member
United States
318 Posts
 Posted 04/14/2019  08:17 am  Show Profile   Bookmark this reply Add mikem007 to your friends list Get a Link to this Reply
Do these Rockwell coins carry a premium in dollar value?
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levelsofmadnes's Avatar
United States
3003 Posts
 Posted 04/14/2019  08:26 am  Show Profile   Bookmark this reply Add levelsofmadnes to your friends list Get a Link to this Reply

Quote:
Do these Rockwell coins carry a premium in dollar value?

I don't know if there is a premium; probably not. I just wanted one IN HAND for knowledge.
Pillar of the Community
United States
2738 Posts
 Posted 04/14/2019  09:58 am  Show Profile   Bookmark this reply Add mikediamond to your friends list Get a Link to this Reply
Right now, ALL Rockwell Hardness Test marks are suspect. Last year I wrote a Collectors' Clearinghouse column in Coin World which cast serious doubt about some of the best, most well-accepted examples.
Error coin writer and researcher.
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levelsofmadnes's Avatar
United States
3003 Posts
 Posted 04/14/2019  10:19 am  Show Profile   Bookmark this reply Add levelsofmadnes to your friends list Get a Link to this Reply
Thanks Mike Diamond.
I guess stand by to stand by.
EDIT: ... for now will put it in a 2x2 for safe keeping
Edited by levelsofmadnes
04/14/2019 10:28 am
Bedrock of the Community
coop's Avatar
United States
62064 Posts
 Posted 04/14/2019  6:31 pm  Show Profile   Bookmark this reply Add coop to your friends list Get a Link to this Reply
I could see a need to test planchets to make sure they are softened. But they don't soften cents, so that theory goes out the window.
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 Posted 04/15/2019  08:56 am  Show Profile   Bookmark this reply Add mikediamond to your friends list Get a Link to this Reply
Copper-alloy cent planchets were annealed (heat-softened), zinc cent planchets are not.
Error coin writer and researcher.
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Pete2226's Avatar
United States
3331 Posts
 Posted 06/29/2019  2:12 pm  Show Profile   Bookmark this reply Add Pete2226 to your friends list Get a Link to this Reply
The anvil effect on the opposite side means this indentation happened after the strike. The shape is also inconsistent with a RTM along with the fact that it is on the bust. A RTM in that area would be expected to be obliterated by the metal movement to fill the area of the bust.

You can see a more extended discussion of RTM in my paper at this link:
https://conecaonline.org/rockwell-h...ncoln-cents/

As an update on this paper, I was recently disappointed to hear from Mike Diamond who just examined the coin I featured in this paper as having likely RTM. He said "Upon examination under high magnification, a (sic) was able to detect a very subtle, very diffuse pressure ridge around each circular pit." I am waiting for him to return the coin now and plan an attempt to see what he is talking about. The marks (there were 2 of them on my coin) must have been subtle indeed, because he also said that they were too subtle to capture digital images!

I am not going to give up the search even though I think that my chances of winning the Lottery would be better than finding a RTM!!

I have established a couple of data bits about RTM
The mint scraps all planchets which have been tested, so it would be less likely one would escape and go into production.
The fact that they scrap the tested planchets illustrates their determination that, depending on the orientation of the planchet in the striking chamber, the RTM could survive the pressure of the strike.
Were dies to have a RTM on the face of the die, the coin struck would have a raised bump. However this cannot happen, because the dies are tested on the neck of the die and not the face.
Edited by Pete2226
06/29/2019 2:13 pm
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levelsofmadnes's Avatar
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3003 Posts
 Posted 06/29/2019  2:30 pm  Show Profile   Bookmark this reply Add levelsofmadnes to your friends list Get a Link to this Reply
Thanks Pete2226.

And good luck on finding a conclusion to your marathon research.
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