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<p>[QUOTE=&quot;briac michaux, post: 9781007, member: 143064&quot;]Dear Nefarius Purpus, I&#039;m happy to find you because I have a few question about your recent publication...</p><p><br /></p><p>could you give us some explain on those points? </p><p><br /></p><p><br /></p><p>1) metal analysis show that &quot;sponsianus&quot; coinage have been made with a poorly purified gold, and with 2 different sources of gold</p><p>to get 2 different sources of native gold, Sponsianus had to controle 2 mines!</p><p>How can he get 2 mines and didn&#039;t let any traces in history?</p><p><br /></p><p>2) how can you explain this</p><p><br /></p><p>&quot;widespread reddish-brown residues on the same coin in and around these cracks that are interpreted as the mould adhering in places (Fig 5A)&quot;</p><p><br /></p><p>&nbsp;for you, part of the mould could stay on the coin for 1800 years, resist to weather, water, circulation... ? </p><p><br /></p><p>3) the realy few ancient cast coins finded in same hoard and made with same original matrix are exactly the same, (see D. Hollard 2001 Sesterces coulés de Gordien III et Postume dans un trésor de l&#039;Oise) I have picture of 3 so called &quot;gordian gold medallions (Paris, Vienna, Glasgow), they are all different, 4 &quot;sponsiani&quot; all different, 4 &quot;Philippus&quot; all different. </p><p><br /></p><p>but in the 3 cases, only 1 &quot;pair of die&quot; was used. and your theory about the manufacturing can&#039;t explain this situation </p><p><br /></p><p>by the way this is typicaly what a modern faker would do to deceive the vigilance of a collector/expert but it have no meaning for circulation coins.</p><p><br /></p><p>4) the manufacturing theory... </p><p><br /></p><p>&quot;Building on these observations, we suggest that the manufacture involved a minimum of six stages:</p><p>-engrave obverse and reverse designs in negative relief on a hard material such as bronze;</p><p>-impress a soft substance, possibly pre-prepared clay tablets, into the engraving to produce positive relief hubs;</p><p>-trim, then harden the hubs by firing;</p><p>-impress the ceramic hubs into soft clay tablets;</p><p>-align and assemble the obverse and reverse tablets in a frame, creating one-time moulds, leaving voids in between and channels to the outside, then harden by firing;</p><p>-cast in molten metal, cool, extract the coins and clean up irregularities and spillage.&quot;</p><p>they also say</p><p>&quot; irregular edges to some features indicating incomplete filling of the mould, especially on GLAHM:29820&quot;</p><p><br /></p><p>I have such moulds in my collection, if filling is uncomplete, you will get a plane part molten gold is like water in a glass, fill level is horizontal, not round... where is that filling line on the coin?</p><p><br /></p><p>Thanks in advance for answers</p><p><br /></p><p>Briac Michaux[/QUOTE]</p><p><br /></p>

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