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 Replies: 12 / Views: 1,420 |
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Pillar of the Community
Canada
849 Posts |
How can you tell the content of the 1967 dime and quarter? There is a place in my album for both silver contents. I have one dime and one quarter but how can I tell if they are 50% or 80%? Do you weigh them or what?
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Pillar of the Community
 Canada
9868 Posts |
There is no practical non-destructive way to tell with absolute certainty
"Dipping" is not considered cleaning...
-from PCGS website
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Pillar of the Community
 Canada
849 Posts |
So is there some kind of copper core? If the coins had all metals mixed, wouldn't the colour be obviously different when comparing .500 and .800? I'm amazed that two varieties would be listed when there is no way of telling the difference.
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Pillar of the Community
Canada
9868 Posts |
There is no core,both types are made from a silver-copper alloy.Nor is there any discernable difference in colour.Some say they can tell the difference by the ring each type makes when dropped on a hard surface.Others say all PL strikes are 80% while the business strikes are 50%.One of SPP`s machines he uses for the study of brass cents &c. would probably do the trick but it`s not practical to have every colllectors `67s analyzed.
"Dipping" is not considered cleaning...
-from PCGS website
Edited by DBM
04/14/2013 10:50 am
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Rest in Peace
1988 Posts |
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Pillar of the Community
Canada
9868 Posts |
wert,there`s no help there for `67 dimes and quarters.If only it were that easy.
"Dipping" is not considered cleaning...
-from PCGS website
Edited by DBM
04/14/2013 11:14 am
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Rest in Peace
1988 Posts |
1967 Quarter...Alloy : 1) 80% silver, 20% copper, 2) 50% silver, 50% copper
1967 Dime...Alloy : 1) 80% silver and 20% copper, 2) 50% silver and 50% copper
That was from the web site..
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Pillar of the Community
Canada
9868 Posts |
I don`t see there where it tells how to differentiate the two types.Is it in the French version?
"Dipping" is not considered cleaning...
-from PCGS website
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Rest in Peace
1988 Posts |
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Pillar of the Community
Canada
937 Posts |
I checked out the link and didn't find a way to tell if my quarter in hand is 50/50 or whether it's 80/20. Did I miss something? I suppose a specific gravity test might work, but the instruments would have to be fairly sensitive for a piece of metal that small. And both metals also conduct electricity, with each having slightly different amounts of resistance, but I don't know if the amount of difference is great enough to be measured. If a meter were sensitive enough it might help sort out your coins. I've also used touchstones on other silver products; they slightly abraid the metal but you might get an answer that way. I wouldn't recommend it on a nice-looking coin though.
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Pillar of the Community
Canada
1581 Posts |
Actually the audio spectrum test does seem to be accurate.
.925, .800 and .500 do generate distinguishable frequency spectrums, when I drop a coin 10 cm.
But, is dropping a coin really nondestructive? Who cares for scrap, but it isn't something to do to collector grades.
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Pillar of the Community
Canada
618 Posts |
Metal spectrometers used by jewelery outlets and coin dealers , pawn shops can do it.
Maybe rent a machine for an hour?
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Pillar of the Community
Canada
618 Posts |
For a couple of coins, they would do it for free.
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Replies: 12 / Views: 1,420 |
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Posted 04/14/2013 01:42 am
