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 Replies: 9 / Views: 1,511 |
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Moderator
 Canada
10460 Posts |
"Discovery follows discovery, each both raising and answering questions, each ending a long search, and each providing the new instruments for a new search." -- J. Robert OppenheimerContent of this post is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported License. See: http://creativecommons.org/licenses...0/deed.en_USMy eBay store
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Pillar of the Community
Canada
4911 Posts |
NOW_THIS^ is just awesome sauce! How do you come across these things!(don't say the press in your basement, lol)
Honestly though, congrats! That is a stunning and amazing error.
Feel free to call me Will.
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Pillar of the Community
Canada
2632 Posts |
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Pillar of the Community
 Canada
9866 Posts |
Nice one!
"Dipping" is not considered cleaning...
-from PCGS website
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Pillar of the Community
798 Posts |
 I would like to think that things like this are gotten at auctions or a coin store I cant go to or something like that but either way, I cant afford stuff like that. What a nice error, I wonder how PCGS is able to find out its a foreign planchet and which country that planchet is from. I also wonder how things like that get out of the mint, don't they not let things like that leave and they recycle errors to use for other coins? |
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Pillar of the Community
United States
807 Posts |
Mass & composition are pretty straightforward to determine, & the correct mass & composition for pretty much all coins of every country are published information. There are also some public records available to show what countries were having their coinage made at whose mints each year. Match that up & you can usually get a good idea of what's what.
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Pillar of the Community
Canada
4911 Posts |
^also SPP has an XRF machine that he is allowed to use...lucky guy.
Feel free to call me Will.
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Pillar of the Community
United States
807 Posts |
I've never figured why X-ray fluorescence spectroscopy was the favoured technique, when it can only look at the surface layer. I want to zap the coin with an electron beam & do a spectrogram on the brehmsstrahlung.
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Moderator
 Canada
10460 Posts |
Quote:
I wonder how PCGS is able to find out its a foreign planchet and which country that planchet is from. They didn't - I did that homework for them. Being non-magnetic was the first clue, then XRF and a simple check of foreign mintages from 1980-1981 with the weight and composition. If I had sent it to PCGS without that information, it would come back as "struck on foreign non-magentic flan"... "Discovery follows discovery, each both raising and answering questions, each ending a long search, and each providing the new instruments for a new search." -- J. Robert OppenheimerContent of this post is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported License. See: http://creativecommons.org/licenses...0/deed.en_USMy eBay store
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Moderator
Canada
10460 Posts |
Quote:
I've never figured why X-ray fluorescence spectroscopy was the favoured technique, when it can only look at the surface layer. That depends on the power of the beam source... we are not talking pXRF machines in my lab  "Discovery follows discovery, each both raising and answering questions, each ending a long search, and each providing the new instruments for a new search." -- J. Robert OppenheimerContent of this post is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported License. See: http://creativecommons.org/licenses...0/deed.en_USMy eBay store
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Replies: 9 / Views: 1,511 |
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Posted 05/09/2015 12:25 am
