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Strange Metal Disease On Surface Of AU Walking Liberty Half

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0xDA71D's Avatar
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 Posted 03/24/2017  8:59 pm Show Profile   Bookmark this topic Add 0xDA71D to your friends list Get a Link to this Message Number of Subscribers
I recently posted this 1944 half dollar in the grading section and people have pointed out that it has a strange surface.

Strange-Metal-Disease-On-Surface-Of-AU-Walking-Liberty-Half
Strange-Metal-Disease-On-Surface-Of-AU-Walking-Liberty-Half

Well, as it turns out, when viewed with 60x magnification, some of the darker spots are actually these alien looking fragments of dark metal, which seems pretty much permanently stuck on the coin (I tried removing them but they are stuck on the coin for good). The underlying surface around these fragments seems discolored due to these fragments. They look like hairs after shaving... But they aren't! Could anyone posit what this disease-like thing on the coin is?



Strange-Metal-Disease-On-Surface-Of-AU-Walking-Liberty-Half
Strange-Metal-Disease-On-Surface-Of-AU-Walking-Liberty-Half
Strange-Metal-Disease-On-Surface-Of-AU-Walking-Liberty-Half
Strange-Metal-Disease-On-Surface-Of-AU-Walking-Liberty-Half
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Fuzzy317's Avatar
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 Posted 03/24/2017  9:06 pm  Show Profile   Bookmark this reply Add Fuzzy317 to your friends list Get a Link to this Reply
some of those appear recessed? which would make me think those were dings/hits in the surface. When the coin was cleaned, those ding/hits were recessed and could not get clean, and thus are more noticeable.
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T-BOP's Avatar
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 Posted 03/24/2017  9:11 pm  Show Profile   Bookmark this reply Add T-BOP to your friends list Get a Link to this Reply
I'm no expert on this but I'm still convinced more now than earlier that your coin is a cast copy .
Hope I'm wrong .
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0xDA71D's Avatar
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 Posted 03/24/2017  9:11 pm  Show Profile   Bookmark this reply Add 0xDA71D to your friends list Get a Link to this Reply
The marks are not recessed.
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Mark1959's Avatar
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 Posted 03/24/2017  9:55 pm  Show Profile   Bookmark this reply Add Mark1959 to your friends list Get a Link to this Reply

Quote:
your coin is a cast copy


That or an extremely worn die with those surfaces. Who knows what those little black things are. If it is a cast coin then those black things were in the poured metal and now are part of the "coin". Can you get a weight on it?
Edited by Mark1959
03/24/2017 9:56 pm
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0xDA71D's Avatar
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 Posted 03/24/2017  10:06 pm  Show Profile   Bookmark this reply Add 0xDA71D to your friends list Get a Link to this Reply
THE COIN IS 100% GENUINE.
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Crazyb0's Avatar
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 Posted 03/24/2017  10:35 pm  Show Profile   Bookmark this reply Add Crazyb0 to your friends list Get a Link to this Reply
Your coin appears dipped in an acid based cleaner. That has removed some microscopic crud and surface metals. Your coin contains only .0715 oxz of silver the rest is a mix. Certain acids react with only certain metals. Looks like you have either a direct reaction to this or it's the residual that the dip didn't eat off.

BTW, are you 100% sure?
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 Posted 03/24/2017  11:20 pm  Show Profile   Bookmark this reply Add jack jeckel to your friends list Get a Link to this Reply
What is the 100% weight of the coin.
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Steele's Avatar
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 Posted 03/25/2017  12:17 am  Show Profile   Bookmark this reply Add Steele to your friends list Get a Link to this Reply

Quote:
Your coin contains only .0715 oxz of silver


what?
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TypeCoin971793's Avatar
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 Posted 03/25/2017  12:37 am  Show Profile   Bookmark this reply Add TypeCoin971793 to your friends list Get a Link to this Reply

Quote:
I'm no expert on this but I'm still convinced more now than earlier that your coin is a cast copy .
Hope I'm wrong .


Explain to me how a cast coin can get coin luster, and I would be more inclunid to agree with you. If you can't, then I would rethink your hypothesis.

There are die flow lines as well as polishing lines, both of which are of small enough resolution to be lost in the casting process. I am seeing a genuine coin here with metallurgical anomalies, whether that be a strikethrough or impurities in the metal.
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John1's Avatar
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 Posted 03/25/2017  05:45 am  Show Profile   Bookmark this reply Add John1 to your friends list Get a Link to this Reply
How did you try to remove the black?
John1
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T-BOP's Avatar
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 Posted 03/25/2017  08:38 am  Show Profile   Bookmark this reply Add T-BOP to your friends list Get a Link to this Reply

Quote:
If it is a cast coin then those black things were in the poured metal and now are part of the "coin". Can you get a weight on it?

Why would this be impossible ?


Quote:
Explain to me how a cast coin can get coin luster

Could it be possible a very light polishing compound and a very light wheel was used for a couple of seconds on each side ?
Hey I'm just throwing things at you guys so we can get to the bottom of this and find out for sure what's up with this coin .
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TypeCoin971793's Avatar
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 Posted 03/25/2017  9:07 pm  Show Profile   Bookmark this reply Add TypeCoin971793 to your friends list Get a Link to this Reply

Quote:
Could it be possible a very light polishing compound and a very light wheel was used for a couple of seconds on each side ?
Hey I'm just throwing things at you guys so we can get to the bottom of this and find out for sure what's up with this coin .


No. Polishing a cast coin will not give it coin luster (cartwheel luster). What you are talking about is whizzing, and that is completely different. I am talking about die flow lines (the essence of luster), which I can clearly see on the OP's coin.
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macmercury's Avatar
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 Posted 03/25/2017  10:27 pm  Show Profile   Bookmark this reply Add macmercury to your friends list Get a Link to this Reply
The coin is genuine!

I am thinking along in the line of carbon toning for lack of proper term? Its almost seem like it was environmental build up and not stored properly.
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colonialjohn's Avatar
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 Posted 03/30/2017  08:10 am  Show Profile   Bookmark this reply Add colonialjohn to your friends list Get a Link to this Reply
I know the answer ...

John Lorenzo
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Conder101's Avatar
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 Posted 03/30/2017  10:31 am  Show Profile   Bookmark this reply Add Conder101 to your friends list Get a Link to this Reply
Enlighten us.
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