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 Replies: 11 / Views: 2,472 |
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Valued Member
292 Posts |
I tested a bunch of Walking Liberty half dollars on my machine only to find one that showed an odd reading on the machine. It matches up correctly on weight, diameter, and thickness with authentic Walking Liberty halves and when I use the "ping" test it sounds identical to other walkers. Is this potentially a gas bubble error on the reverse that caused the alloyed metal to get a little "weird" causing it to read funny on the machine? Thoughts? Thank you!     |
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Valued Member
United States
170 Posts |
Did you test your machine against every other coin? I wouldn't imagine something that minor throwing off a machine like that , especially since individual coins can vary in weight in the same series based on wear what whatnot.
Jasper
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Bedrock of the Community
United States
10635 Posts |
Not 100% sure what your question really is, but it sounds like the issue is with your machine, not the coin.
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Valued Member
 292 Posts |
I tested over 200 coins that got perfect reading suggesting they are indeed 90% silver. This is the only coin that was off slightly on the reading and it also contains a strange and small bump on the right side of the reverse.
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Valued Member
United States
452 Posts |
I guess I'm not understanding what the machine is SUPPOSED to show. It's saying 90% silver, US, pre-1945 all of which accurately describe that coin...
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Valued Member
United Kingdom
179 Posts |
Try soaking the coin in acetone and measuring again, looks like you may have some crud on the coin throwing off the reading. Weird bump tho, but wouldn't think anyone would counterfeit this coin, isn't its potential value too low?
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Valued Member
292 Posts |
The machine tests if the metal is 90% silver alloyed or not. The machine is suggesting that it is NOT alloyed at the typical range acceptable of 90% silver coinage from that era. People have counterfeited 1965 Washington quarters... I'll say it again... 1965 Washington quarters :) NEVER assume that a coin is real based only on the coins's value. |
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Pillar of the Community
United States
3469 Posts |
Is the blue rectangle outside the brackets the indicator that the metal is outside the acceptable range?
Edited by nfine
03/24/2020 07:59 am
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Valued Member
292 Posts |
Yes that's what it means. It being so close to the line is generally a sign of it being a little off.
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Pillar of the Community
United States
9792 Posts |
The coin looks okay, hard to say positively from the small photos, but I'd guess what you are seeing is a small occluded gas bubble in the planchet. Worth a small premium to an error collector, but as a planchet error, as opposed to a striking error, it doesn't have the appeal or added value. Maybe an extra few dollars to the right collector.
"Buy the Book Before You Buy the Coin" - Aaron R. Feldman - "And read it" - Me 2013! ANA Life Member #3288 in good standing since 1981, ANS, Early American Coppers Member (EAC), Colonial Coin Collectors Club member (C4), Conder Token Collector Club member (CTCC), Civil War Token Society (CWTS) member, Liberty Seated Collectors Club (LSCC) & Numismatic Bibliomania Society member (NBS), USMex, Member in good standing, 2¢ variety collector. See my want page: http://goccf.com/t/140440 |
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Valued Member
United Kingdom
179 Posts |
Just saw your video, I had no idea you could get gas bubbles on non-plated coins! Perhaps the gas bubble and the fact that the readings change depending on where the sensor is focused on the coin are symptoms of improper metal mixing?
Interesting to think about, thanks for the knowledge guys!
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Pillar of the Community
United States
1962 Posts |
Your pics are not good... but that piece has a curious look to it.
Contemporary counterfeit Walkers DO exist.
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Replies: 11 / Views: 2,472 |
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Posted 03/23/2020 9:45 pm
