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 Replies: 43 / Views: 5,325 |
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Bedrock of the Community
United States
17884 Posts |
Quote:
Some coins from the 1800's have values imprinted along the outside edge of the coin which counterfeiters find impossible to duplicate. They are replicating the edge inscriptions now as well. |
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Pillar of the Community
United States
1372 Posts |
I don't know hpw many fake Mercury dimes I've seen offered on ebay. They're offered by regular sellers who ought to know the difference. I think they're easy to spot, but not everybody would think that common date mercs would be profitable to counterfeit. They are doing so much of it in China that it's a real danger to the hobby. It used to be that only the high end and rare stuff was vulnerable to counterfeiting...and now just because it's only a 42 merc, doesn't mean it's not fake. Chance Edited by Chancellor Sutler
11/03/2011 10:35 pm
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Valued Member
 United States
154 Posts |
Every time I log into this website, I learn something new, especially about the 1849 Double Eagle and there being only two in existance... Did they really try to fake a coin that everyone (well, I guess I was ignorant) knows there are only two copies?
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Pillar of the Community
United States
7840 Posts |
Edited by oih82w8
11/04/2011 2:43 pm
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Bedrock of the Community
United States
17884 Posts |
On the 1849 double eagle, two proofs were struck. One is in the Smithsonian and the other hasn't been seen since the 1880's I saw the Smithsonian piece at the ANA show in Chicago this year. Proof, hairlined from an old harsh cleaning, with a moderately heavy scratch across the obv. Edited by Conder101
11/04/2011 11:42 pm
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Pillar of the Community
United States
1984 Posts |
There are fakes out there in every denomination. But you really need to observe the difference betweem "fake" and "counterfeit." I guess the simplest way to look at it would be that a fake is designed to fool a collector and a counterfeit is designed to fool a merchant. The fact that a counterfeit fools a collector does not make it a fake. I recently found a well-worn 1928 Mercury dime counterfeit and was excited about it. Some people prefer to place a fake in an empty hole in an album they don't think they're going to ever fill because to them an empty hole is a failure rather than a challenge. |
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Pillar of the Community
United Kingdom
856 Posts |
Yes. Here in the UK, we're certainly seeing fake coins (not contemporary counterfeits, which as halfisbetter noted, were made at the time the original coins were produced to be passed as currency) more regularly. Some are sold on ebay. Some through auction houses or dealers. Some appear to have been slabbed by reputable TPGS, though there's a chance the slabs themselves are also fake. The fakes are really very good. Weight, toning and metal are as you would expect. Generally I believe the only way to tell you have one is if you see more than one coin with the same marks, wear or quirks to the design at the same time. The trouble is, not all collectors pore over auction catalogues and discuss their coins with others all day. So unless someone asks somewhere like here and posts a photo for comparison, it could be a long time before they know they have a modern fake. And if you buy from a reputable source or your coin is slabbed ... why would you suspect? Very worrying for collectors. Even more so for those 'investing' in the future value of their coins. |
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Bedrock of the Community
United States
20753 Posts |
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On the 1849 double eagle, two proofs were struck. One is in the Smithsonian and the other hasn't been seen since the 1880's Guess that means my entire roll of those may not be real.  |
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Pillar of the Community
United States
648 Posts |
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Moderator
 United States
23522 Posts |
There are unwitting fakes being sold every day. In many cases, they're being sold by honorable people - stories abound here at CCF of ebay sellers immediately doing the right thing when one of our members presents them with appropriate proof that the coin is a counterfeit. It doesn't always go that way, of course, but we remember the malicious ones more than the success stories. |
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Valued Member
United States
154 Posts |
Last month I went into a pawn shop and bought several Morgans that looked in decent shape. When I took out a magnet, they were not attracted to the magnet but it did "push" them around, which even surprised the owner. Were those fakes? I spent way too much on them, $30 each, considering silver dropped to nearly 18/troy oz yesterday. I would say they're F to VF, no important dates.
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Pillar of the Community
Australia
2180 Posts |
I'd be surprised if it weren't the case unfortunately. I've seen slabbed fakes posted a few times and I'm not sure if the slabs were faked in those cases.
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Pillar of the Community
United States
648 Posts |
cinemabon Those are most likely genuine!  This is due to a counter magnetic field set up by the magnet moving toward the silver/copper then away from it. A TFD unit works on same eletro/magnetic effect just very precisely and repeatable. |
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Moderator
United States
23522 Posts |
Quote:
Last month I went into a pawn shop and bought several Morgans that looked in decent shape. When I took out a magnet, they were not attracted to the magnet but it did "push" them around, which even surprised the owner. Were those fakes? I spent way too much on them, $30 each, considering silver dropped to nearly 18/troy oz yesterday. I would say they're F to VF, no important dates. Silver is diamagnetic, which is to say that it creates a weak opposing field to an applied magnetism. I've never really researched it, but especially if the magnet being applied is a strong one, I'm not totally surprised that it might "repel." We normally test such coins by bringing the magnet to them vertically, or vice-versa, since you don't really have to let the magnet touch the coin to feel the attraction; I've never tried approaching it from the side on a flat surface to test it. |
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Pillar of the Community
United States
648 Posts |
What exactly is happing when a person feels something with a magnet and a coin? A very good question . There are laws to describe the forces. It is not simple. Quote:
Quote from the Wikipedia Faraday's law (and many more)
Some physicists have remarked that Faraday's law is a single equation describing two different phenomena: the motional EMF generated by a magnetic force on a moving wire (see Lorentz force), and the transformer EMF generated by an electric force ( due to a changing magnetic field (due to the Maxwell- - "Faraday equation). OR We know of no other place in physics where such a simple and accurate general principle requires for its real understanding an analysis in terms of two different phenomena.
- - " Richard P. Feynman, The Feynman Lectures on Physics
Very deep but not very helpful if you want to know if the coin your holding is real. Yes silver is diamagnetic,  as is water. (frogs can float in a very strong field) Bismuth is 18 times more diamagnetic than silver, still not helpful. Try graphite or pyrolitic carbon 1000 times more. the highest known, so much so that it floats over an array of magnets. No friction. Very skittish . Not slowed down. Eddy current may be the best working theory. Silver has the highest conductivity, copper very close. Conductors resist moving magnets by producing an electric field (why generators/motors work) Think of a coin as a small section of wire. When a moving magnet come close it resists by making An opposing field. The faster you move it the stronger the force. You can pull or push a coin a round a table with a very strong magnet. A useful test. Or you can slide it down the face of a coin, (slows way down)also a good test  Damping effect, aka magnetic braking. To make this effect repeatable and precise enough to say tell a Henning nickel from a genuine one. You need a platform that, protects the coin! And eliminates the variables. What a TFDwall does. Edited by tokenmast
06/22/2013 09:01 am
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Replies: 43 / Views: 5,325 |
First Page
Posted 11/03/2011 10:34 pm
