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 Replies: 9 / Views: 2,229 |
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Pillar of the Community
 United States
1000 Posts |
...Original issue, Republic of China, 1914-1921 ... .890 silver, 26.4g,39mm... ...counterfeits appeared almost immediately ... ...this one is silver (purity unknown, but probably .800 or so) ... ...shows signs of circulation... ...all other features, but the weight, are correct (underweight by about 5.5g)... ...don't recall where I got this... ...thought I'd share...    |
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Pillar of the Community
Singapore
631 Posts |
Didn't need to break out all that fancy lab tech ... there's no Year 5 for YSK 1 Yuan.
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Moderator
 Australia
16181 Posts |
If it's that far underweight, I'd strongly suspect it isn't made of silver at all - or maybe just a very thin silver wash. The laws of phyics say that you can't have a fake that's significantly underweight, but otherwise identical in terms of size and thickness, and still have it reasonably high silver fineness - surely the density of this coin would have to be be significantly lower than normal. I have a fake Chinese dollar that's even further underweight, at just under 19 grams. It's solid brass, with some kind of icky pseudo-silver wash applied to it that has now mostly rubbed off, and fake "tarnish" that seems to have been applied with a spray-paint gun:   Mine's a lot less authentic-looking than the OP's coin. Don't say "infinitely" when you mean "very"; otherwise, you'll have no word left when you want to talk about something really infinite. - C. S. Lewis
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Pillar of the Community
 United States
1000 Posts |
...never tested for purity, but it does 'ring' like silver on a marble surface ... first thing I did was weigh it, saw that it was way underweight, & tossed it in my counterfeit pile ...
...could be a low grade silver / copper mix ... I am curious & will have it tested ... thanks for the input ...
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Moderator
United States
32709 Posts |
@mrw, this previous thread on real vs. fake Fat Man Dollars might be of some interest to you: http://goccf.com/t/397629If you determine specific gravity, I'd be interested to hear that number. Thx. "If you climb a good tree, you get a push."
-----Ghanaian proverb
"The danger we all now face is distinguishing between what is authentic and what is performed."
-----King Adz
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Pillar of the Community
United States
1000 Posts |
Hi, Spence ... I have no idea how specific gravity testing is done ... any info on this will be appreciated, &I'll see if I can get it done ...
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Pillar of the Community
United States
1805 Posts |
Already mentioned above about that numeral 5 that doesn't belong.
Apart from that, the smoking gun to me is not only the numeral 5, but it is on a 6 character legend.
The 6 character should just have a numeral 3.
Other years 8, 9 and 10 appear on the 7 character legend.
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Moderator
United States
32709 Posts |
@mrw, thx for following up. I found this old thread describing how to perform specific gravity testing by using the CCF search box. There is a ton of good information to be found in that way here is a link: http://goccf.com/t/39666 "If you climb a good tree, you get a push."
-----Ghanaian proverb
"The danger we all now face is distinguishing between what is authentic and what is performed."
-----King Adz
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Pillar of the Community
United States
1805 Posts |
My go to SG method is much more simple when it comes to large coins where best accuracy is not critical.
To see the wrong composition from good coin silver it works well enough.
But as is usually the case, my suspended N-52 magnets would indicate if I should bother to make the SG test or not.
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Pillar of the Community
United States
1000 Posts |
...I'm gonna bypass complicated scientific procedure, & just go Old School here ... ...Watch very closely, now....  ...now add Mr. FATMAN...  ...Well, dang! ... so much for trusting that 'ringing' in my ear .. must be my tinnitus actin' up again ... |
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Replies: 9 / Views: 2,229 |
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Posted 09/18/2023 10:40 am
