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Chemically Whizzed Coin

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leprecoin's Avatar
United States
148 Posts
 Posted 06/05/2010  11:02 pm Show Profile   Bookmark this topic Add leprecoin to your friends list Get a Link to this Message Number of Subscribers
So I just encountered this doctoring method, and will try to illustrate, maybe it will save somebody from a mistake in the future...
when one say "whizzed coin" I expect the coin to show very rough wire brush like signs. usually from the center out, but is not always the case...
here is a sample picture...

Chemically-Whizzed-Coin

So far so good, its a breath taking piece, but something feels wrong... so you take a closer look, but there's no brushing signs.
instead all you see those fine ripples...

(great opportunity for me to practise cheap camera photography via loop ;)


Chemically-Whizzed-Coin


And last, here is a sample of how the surface should look...

Chemically-Whizzed-Coin
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swamperbob's Avatar
United States
5362 Posts
 Posted 06/05/2010  11:43 pm  Show Profile   Bookmark this reply Add swamperbob to your friends list Get a Link to this Reply
leprecoin How was that done? To me that looks a lot line "orange peel" wear on an aging die. Was the "Chemical Whizzing" done in your presence or by someone you know? I am very interested because I fear this technique could be used to treat transfer die impressions and improve their "photographic appeal".
Valued Member
leprecoin's Avatar
United States
148 Posts
 Posted 06/06/2010  12:23 am  Show Profile   Bookmark this reply Add leprecoin to your friends list Get a Link to this Reply
Bob, I wouldn't be too concerned, because even it looks like a gem,
if you know your coins, you can feel right away that something is going on with this piece, something like, too good to be true...
to answer your question, I don't know how it was done, just ideas... I showed the coin to few experts in the field, and they all refer to "Whizzed" right away. some suggested that it was coated with some sort of powder processing, some say just some kind of chemically process one said some sort of sonic cleaner combine with chemicals, but they all separately agreed to "whizzed"
I don't know when this particular coin was doctored, but someone told me it was very common in the 80's.
I tend to think it was coated, because it seems the ripples are on the raised area too (well, there isn't much of raised area on this coin) but I would think that might be indication.
here's a link to an article written by Rick Montgomery about this,
(he was actually one of the experts I showed the coin to)
http://www.pcgs.com/articles/article2194.chtml
I don't have much experience with orange peel, Does it shows on the design or just the surfaces ?

is above my ability to picture this, but here is an attempt...
Chemically-Whizzed-Coin
Valued Member
Australia
432 Posts
 Posted 06/06/2010  06:42 am  Show Profile   Bookmark this reply Add Zaggy to your friends list Get a Link to this Reply
You know, this looks plated to me. I plated all sorts of things in a previous job and this looks like a slightly dodgy plating job (probably done with a home electroplating kit or over poorly prepared metal)... You'll see a similiar effect on some 'Gold-Plated' coins, when the plating hasn't completely gone to plan...

So, my vote is for plating...
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swamperbob's Avatar
United States
5362 Posts
 Posted 06/06/2010  08:05 am  Show Profile   Bookmark this reply Add swamperbob to your friends list Get a Link to this Reply
leprecoin Orange peel is usually seen clearly in the fields but the effect extends to all details, usually in the form of erorsion of the high pressure side. I thst respect it is not like yours.

I do see that the effect extends over the letters and details and it seems to me that there is no loss of material at the sharp edges of the details which is always seen on "whizzing".

So I guess we need to look further at how this was done.

Zaggy You may be onto something with plating over a poor surface. That makes more sense and it fits with the expanded explaination that the owner got from experts.

Quote:

...suggested that it was coated with some sort of powder processing, some say just some kind of chemically process one said some sort of sonic cleaner combine with chemicals,


A coating of some sort mechanical or chemical would improve the surface.

My concern is the way the coin looks in photographs not the way it looks in person. By the time these Chinese fakes arrive it is too late usually and forget the idea of a refund from China.
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needgames4lyfe's Avatar
United States
323 Posts
 Posted 06/06/2010  09:17 am  Show Profile   Bookmark this reply Add needgames4lyfe to your friends list Get a Link to this Reply
Very nice write up - thanks
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macmercury's Avatar
United States
5823 Posts
 Posted 06/06/2010  10:04 am  Show Profile   Bookmark this reply Add macmercury to your friends list Get a Link to this Reply
Thanks or sharing this, I have seen a few I felt questionable in local show and glad I didn't buy it.
Valued Member
leprecoin's Avatar
United States
148 Posts
 Posted 06/08/2010  12:22 pm  Show Profile   Bookmark this reply Add leprecoin to your friends list Get a Link to this Reply
Ok. here are some more new assumptions and might be very ignorant ones, so please refer to them as such!
I read that whizzing basically cause the metal to move about the surface of the coin, rather then "grinding it"
So I noticed those raised edges all around, they do not exist on other examples of the same coin, so I assume that was caused by the metal pushed up, maybe by heat while rotary wired ?
and then finally plated.
its probably easier said then done...

I don't know much about double striking and such, and I wonder if that could be the case but I doubt it.

any other ideas of what can caused those raised edges on the lettering?

Maybe is just a fake piece to begin with?

or maybe like someone suggested, an unknown pattern/proof exotic one of a kind sample ? Chemically-Whizzed-Coin
Edited by leprecoin
06/08/2010 12:25 pm
Pillar of the Community
United States
2600 Posts
 Posted 06/08/2010  12:42 pm  Show Profile   Bookmark this reply Add Jim1953 to your friends list Get a Link to this Reply
Now don't laugh. I have sandblasted a lot of different things and quite often the remaining surface shows a very similar type of textured effect. I am wondering what a coin would look like if you used the equivalent of the baking soda polishing spray that dental hygienists. Just a thought.

Jim
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