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 Replies: 19 / Views: 2,846 |
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Rest in Peace
1988 Posts |
Hi guys I have have a 1974 quarter under plastic since, well, 1974...It is a dull finish compared to other quarters around that year...Or, is that normal for 1974 quarters...?  |
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Pillar of the Community
Canada
1733 Posts |
Is it magnetic?
A few things can cause nickel to become this colour, the most common is heat. Others include a few chemicals and so on including plasticizers sticking to the coin.
It could potentially be an incorrectly annealed planchet and I'd expect some strike problems if it were that. In the dewlap I see a particularly crappy strike and a low relief through the antlers and in teh denticles.
Not sure really, shoot the coin from both sides please.
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Rest in Peace
 1988 Posts |
Hi Ugly Here is quick picture of the other side...It is magnetic.  |
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Pillar of the Community
Canada
1984 Posts |
Looks like it might be PVC residue.. I hope not! Was it is a soft flexible plastic?
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Rest in Peace
1988 Posts |
Hi asimpson91
It was in those coin holders made of cardboard with a plastic circle like they used to use and still do...Funny thing is that all my coins were in those holders and this is the only faded one.
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Pillar of the Community
Canada
1984 Posts |
If you put the coin in the holder and it was nice looking when you put it in, I would bet on PVC damage. Some old 2x2s used poor quality plastic.
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Pillar of the Community
Canada
1733 Posts |
Yeah I'm going with some type of chemical contamination, there are a few nice shiny spots on HRH and the strike is OK. Dewlap is probably filled with a little with whatever it is on the reverse.
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Rest in Peace
1988 Posts |
OK guys, thanks for the explanation.
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Pillar of the Community
Canada
2781 Posts |
did you wiegh it by chance? i found something similiar https://goccf.com/t/106715at first I thought it was missing plating (new to this, didnt realize they werent plated) then thought maybe enviromental damage but the details were all there, maybe a similiar "bad planchet" |
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Rest in Peace
1988 Posts |
Hi wade I weighed it with my wife's kitchen scale....Did it 3 times and it weighed 6 grams every time...  I looked up a 1974 quarter and it is suppose to weigh 5.07 grams, strange because it doesn't look bigger than a normal quarter...Of course my weigh scale may be out, but it shows it measures to 1/1000 th of a gram. I 1972 was the last year they made quarters that weighed 5.83 grams and went to 5.07 grams after that. Edited by wert
01/12/2012 10:17 am
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Pillar of the Community
Canada
1733 Posts |
A kitchen scale just is not accurate enough imo wert.
At the least I use a small digital scale that I calibrate with a certified 1gram weight (gold in this case), when I need a more exact measurement I stroll into the jewelers as they usually have scales capable of 1/10 of a gram with accuracy.
I can't say the scale you're using is wrong either, I just think it's something to watch out for.
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Rest in Peace
1988 Posts |
Thanks Ugly for the heads up...Do most coin shops sell fairly accurate scales that would be good enough for my personal use with coins....?
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Pillar of the Community
Canada
1984 Posts |
You can probably buy a cheap digital scale on ebay for maybe $10 or $20 out of Hong Kong. |
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Rest in Peace
1988 Posts |
Excellent...Thanks Smallcentguy...Will look into it.
Is a scale that is accurate to 0.1 grams good enough...?
Edited by wert
01/12/2012 1:04 pm
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Pillar of the Community
Canada
1733 Posts |
That's pretty much as good as you can expect Wert, I'd go for it. Test it when you get it with known good items, like say an uncirculated silver ten cent.
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Pillar of the Community
Canada
2781 Posts |
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Replies: 19 / Views: 2,846 |
Posted 01/11/2012 5:57 pm
