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 Replies: 12 / Views: 7,009 |
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Valued Member
United States
62 Posts |
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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Moderator
 United States
56855 Posts |
5.75 for silver,5.67 clad. Try the tissue test but I do not think your coin is silver. John1  |
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Pillar of the Community
United States
5240 Posts |
 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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Valued Member
 United States
62 Posts |
Here a picture of the reeded edge and the tissue paper test   |
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Pillar of the Community
United States
5240 Posts |
It is a clad quarter, the copper says it all.
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Bedrock of the Community
United States
94367 Posts |
Must be. Aren't the edges of a 40% silver coin silver in appearance?
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Pillar of the Community
United States
5240 Posts |
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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Pillar of the Community
United States
3664 Posts |
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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Pillar of the Community
United States
2775 Posts |
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. Edited by Halo1st
01/10/2019 3:01 pm
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Bedrock of the Community
United States
17884 Posts |
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 |
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Bedrock of the Community
United States
62064 Posts |
On the edge view, I can see the copper layer. Picture #3.
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Pillar of the Community
United States
3664 Posts |
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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Valued Member
United States
62 Posts |
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Replies: 12 / Views: 7,009 |
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Posted 01/09/2019 6:21 pm
