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 Replies: 125 / Views: 38,035 |
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Pillar of the Community
 United States
5615 Posts |
XoG, Hello, I have read your reply and reinspected the "mystery coin", it does not have ANY cast markings at all. I would also not expect ANY counterfeit coins to be made with silver, believe me, this coin is silver, did the magnet test and the coin was not attracted to the magnet. I really feel from the "expert advice" and opinions from all that my original hunch, wrong struck planchet, is the most probable rationale, just missing the copper core? If this was true how does the silver, which I know was not used in 1996 Quarters, except proofs, get in the picture. I would also state that the mint mark on this coin is apparently from Denver.Please keep the comments coming, Mike...  |
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Pillar of the Community
United States
2589 Posts |
The only other thing I can think of is that somehow a silver planchet got mixed in with some extra clad planchets that were shipped to denver from sanfrancisco. This happened in the 70's with 40% silver ikes halves and quarters being struck at denver. Maybe something similar occured with your coin. If not it might be an intentionally made mint error like the 1971 silver quarter we saw on the forum last year.
-XoG
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Pillar of the Community
United States
5615 Posts |
XoG, I was under the impression that Denver has their own in house planchet operation, I could be wrong, but I also know San Fran makes their own and delivers to other branch's.
If my information is correct, this would seem unlikely the planchet came from another branch, but there is always the possibility a silver planchet slipped in the coining process some how, but would not explain the weight, and thickness of this coin. Stranger things have been known to occur at the mint, intentionally made or just an oversight,either way, this coin is NOT an everyday find, in fact I have been collecting since 1963 and have not seen another like it, I would venture others have, but not me. Mike...
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Pillar of the Community
United States
2738 Posts |
At this late date, it's unlikely to be silver. The ring test isn't entirely reliable, since a thinner-than-normal copper-nickel planchet will have a sharper ring than a coin of quarter thickness. Specific gravity will provide a more accurate picture.
Error coin writer and researcher.
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Pillar of the Community
United States
5615 Posts |
Mike, I am fortunate to have this expertise and the willingness to share the information at my finger tips being a member here. I have never done a specific gravity test on a coin before, I have read a post by a member or two on how to perform this procedure,a while back, I just have to re-locate it and follow the directions ( I believe a member gave a step by step instruction to achieve the proper results to this test ). I would also ask is there any other metal that would give the pinging sound of a silver coin that could be a possibility other than silver in this coins composition? I would also like to know, if anyone would happen to know, how the TPG'S would determine this coins make-up. I mean if I submit this coin and state on the submission form "missing copper core", how would they confirm that! Again thanks for all the information and advice from all, Mike....PS, I will once achieved, post those results! It is not everyday one of our expert members makes an offer to me about a coin, to check it out and do a write up in CoinWorld about it!  Edited by Morgans Dad
03/29/2010 10:20 am
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Pillar of the Community
United States
2738 Posts |
Specific gravity is easy to do in theory, but difficult to do well in practice. You'll need a balance accurate to at least the nearest .01g, preferably the nearest .001g.
Error coin writer and researcher.
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Pillar of the Community
United States
5615 Posts |
I have found the directions for the specific gravity test. I now need a better scale to achieve the proper results. I would still like to know how a TPG would determine, if I submitted this coin with "missing copper core" on the submission form, to indeed be a fact or not!! |
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Bedrock of the Community
United States
17884 Posts |
Quote:
I have noticed that especially for older quarters, the copper core is uneven, so that some might have more copper and some might have less. Typically that is the result of a "smearing" of the metal along the edge as the blank is punched out. One layer of coppernickel gets smeared over the copper, and the copper gets smeared over the next layer of coppernickel, and that fianl layer of coppernickel often seems to be either very thin or disappears completely. Quote:
I do believe I know the ring of "silver"! Maybe so, but a planchet that close in size of the quarter would weigh as much as a standard coppernickel clad quarter not less. I suspect a counterfeit from a slightly thinner planchet and possibly very slightly smaller in diameter. Ring timbre also varies with the thicknes of the struck piece. |
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Pillar of the Community
United States
5615 Posts |
Conder101,
Hello, I saw your remarks and placed the quarter in a micrometer, a 1998 comparison quarter has a diameter of .950, the quarter of this topic measures .940, you were correct in that statement.
I would say to your other remark about the quarter "should weigh as much as a clad quarter not less"
Picture this example, if this coin was struck from the wrong planchet or even a quarter planchet that was not properly composed and then struck, would'nt that planchet be lighter being it was either missing the core or the other option, it was struck on a wrong planchet?
I would also agree the sound of a lighter than normal coin would have a different ring to it as opposed to one of a heavier weight to it, but I know the sound of silver and I do believe this is a silver struck coin!!
I know you are a bright, and experienced Collector/Numismatist, from following your remarks for the past few years and I appreciate your input on this subject, I am going to send this "mystery" coin to MR.DIAMOND for his also experienced opinion and see what ever He feels this coin is, Thanks for your input, be well, Mike...PS, I do not think the coin is counterfeit, having the coin in hand.Check out the clarity of Georges hair, talk about well struck!!
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Pillar of the Community
United States
2738 Posts |
I also think a counterfeit is highly unlikely. But the probability is still greater than zero. I'll know for sure after I get it. And the specific gravity test will tell me whether it's a silver alloy.
Error coin writer and researcher.
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Pillar of the Community
United States
5615 Posts |
Mike, the "mystery coin" is in the you S P S system, coming to you, Mike....
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Valued Member
United States
273 Posts |
I thought silver weighed more than clad coinage of the same size. So even though it is thinner that a regular quarter I would think it would weigh about the same. Also I found a clad error Statehood Quarter that was missing the copper-nickle layer on the back and it sounded like a silver quarter to me when I flipped it even though I knew it wasn't. I personally don't think it is silver, but it could be missing the copper which would be neat. Just my Two Cents. I am interested to see what Mike says after he gets the coin. |
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Pillar of the Community
United States
5615 Posts |
Siuol
I believe Mr Diamond, If things are news worthy, will post his findings, actually I believe either way He will post any results.
I too know that a quarter silver planchet is heavier than a clad one, but the wrong silver planchet, which I am leaning towards, is my contention, some other sized planchet might of been used, just my opinion......It is all just opinions, yours , mine,& others even the experts, just the experts opinion holds more weight because of their experience and knowledge, this is just, in my opinion.
I must also say that even an experts opinion is subjective, in that I mean we all have the ability to use our judgement on everything we encounter, call me cynical, or just like to exercise my reasoning ability and take in all the information and try then to make an educated, rational decision, this is not an exact science, as I age, I find this to still be proof that I am wrong much too much,in these decisions, more often than not! PS, Mike, please post when you receive the "mystert coin", thanks again...
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Pillar of the Community
United States
1934 Posts |
whew..read the entire thread...can hardly wait.
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Pillar of the Community
United States
5615 Posts |
I can honestly state, "NO one awaits the diagnosis more than I"......In my opinion.
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Replies: 125 / Views: 38,035 |
First Page
Posted 03/28/2010 6:49 pm
