Re 上市 Deposited
[Colonial Numismatics] RR40
- From rg5turc@aol.com Mon Oct 07 16:46:29 2002
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Date: Mon, 7 Oct 2002 19:46:19 EDT
Subject: Re: [Colonial Numismatics] RR40
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I don't think you can use SG to decide if a coin is cast but rather use it as
one of the tools available. The key elements in identifying a "contemporary"
cast are the visual ( signs of port's and filing, blurring of letters, gas
bubbles) for example. Then I feel that measuring weight and
vertical/horizontal diameters are of key importance. In the case of well
made "contemporary" cast's I have found that SG and the use of XRF to aid in
reaching a decision. Are these tests fool proof... no... but they can be
helpfull.
Ray T.
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<BR>
I don't think you can use SG to decide if a coin is cast but rather use it as one of the tools available. The key elements in identifying a "contemporary" cast are the visual ( signs of port's and filing, blurring of letters, gas bubbles) for example. Then I feel that measuring weight and vertical/horizontal diameters are of key importance. In the case of well made "contemporary" cast's I have found that SG and the use of XRF to aid in reaching a decision. Are these tests fool proof... no... but they can be helpfull.<BR>
<BR>
Ray T.</FONT></HTML>
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