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1977 D State Quarter 40% Silver Please Identify

 
 
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 Posted 01/09/2019  6:10 pm Show Profile   Bookmark this topic Add gabe999 to your friends list Get a Link to this Message
Hy I have a 1977 quarter which weighs 5.43 while a a newer quarter weighs on my scale 5.67 is the 1977 quarter the 40 % silver quarter I saw on Heritage Auctions
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 Posted 01/09/2019  6:15 pm  Show Profile   Bookmark this reply Add John1 to your friends list Get a Link to this Reply
5.75 for silver,5.67 clad. Try the tissue test but I do not think your coin is silver.
John1
( I'm no pro, it's just my humble opinion )
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 Posted 01/09/2019  6:21 pm  Show Profile   Bookmark this reply Add Jim0815 to your friends list Get a Link to this Reply
with John1. If you would also take a pic of the edge of the coin, I would like to see the reeded edge.
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 Posted 01/09/2019  6:37 pm  Show Profile   Bookmark this reply Add gabe999 to your friends list Get a Link to this Reply
Here a picture of the reeded edge and the tissue paper test

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 Posted 01/09/2019  6:50 pm  Show Profile   Bookmark this reply Add Jim0815 to your friends list Get a Link to this Reply
It is a clad quarter, the copper says it all.
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 Posted 01/09/2019  7:04 pm  Show Profile   Bookmark this reply Add Coinfrog to your friends list Get a Link to this Reply
Must be. Aren't the edges of a 40% silver coin silver in appearance?
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 Posted 01/09/2019  7:23 pm  Show Profile   Bookmark this reply Add Jim0815 to your friends list Get a Link to this Reply
The only silver clad quarters I know of were minted in 1976. I have one and it the edge is silver.
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 Posted 01/09/2019  9:58 pm  Show Profile   Bookmark this reply Add fortcollins to your friends list Get a Link to this Reply
A specific gravity test would be conclusive.

CNC coins have a specific gravity of 9.53, and 40% silver clad coins have a specific gravity of 10.34.
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 Posted 01/10/2019  2:30 pm  Show Profile   Bookmark this reply Add Halo1st to your friends list Get a Link to this Reply
Coin seems a bit worn to me. The weight puts it just under the clad tolerance +/- 0.227 grams. The current tissue test and edge view images suggest copper / nickel clad.

Quote:
CNC coins have a specific gravity of 9.53, and 40% silver clad coins have a specific gravity of 10.34.

Maybe wrong, but my specific gravity reference shows -

10.34 - 90% silver
9.53 - 40% silver clad
8.92 - Copper / nickel clad

Thanks, Doug.
Second opinions are always recommended. Rookies thoughts!
Two sides to every coin. The edge makes three.
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Edited by Halo1st
01/10/2019 3:01 pm
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 Posted 01/11/2019  11:33 am  Show Profile   Bookmark this reply Add Conder101 to your friends list Get a Link to this Reply

Quote:
The weight puts it just under the clad tolerance +/- 0.227 grams

And well outside the tolerance range for 40% silver. 5.75 grams +/- .2 grams so minimum of 5.55 grams
Gary Schmidt
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 Posted 01/11/2019  6:38 pm  Show Profile   Bookmark this reply Add coop to your friends list Get a Link to this Reply
On the edge view, I can see the copper layer. Picture #3.
Richard S. Cooper
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 Posted 01/11/2019  7:48 pm  Show Profile   Bookmark this reply Add fortcollins to your friends list Get a Link to this Reply

Quote:
Maybe wrong, but my specific gravity reference shows -

10.34 - 90% silver
9.53 - 40% silver clad
8.92 - Copper / nickel clad

Thanks, Doug.


Doug, you are absolutely correct. I have an Excel spreadsheet with the numbers, and I tracked down the wrong line. My bad.

That'll teach me about posting while The Boss is giving me my updated honey-do list!
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 Posted 01/15/2019  9:57 pm  Show Profile   Bookmark this reply Add gabe999 to your friends list Get a Link to this Reply
Ok thanks everyone
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