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<p>[QUOTE=&quot;dougsmit, post: 2004585, member: 19463&quot;]Regarding color:&nbsp; I always believed that the brown Postumus coins were later and the gray ones had more silver and were earlier with billon/porous ones lik your Serapis in the middle.&nbsp; A recently posted link to a site dividing them into issues contradicted this but the fact remains that some types are usually gray and other types are brown/dark.&nbsp;&nbsp; Compare my two like the above Pax and Serapis.&nbsp; My photo makes the dark pax lighter than it is. </p><p>[ATTACH=full]359744[/ATTACH] [ATTACH=full]359745[/ATTACH] </p><p><br /></p><p>There are exceptions including Moneta which I believe was issued more than once.&nbsp; We see the same thing in Gallienus whose metal was being debased continuously at the same time.&nbsp; You might find your IOVI VICTORI in lighter brown but I doubt you will get it gray.&nbsp; The color looks like a hoard that was batch cleaned and retoned as is common with these huge hoards that have been found.&nbsp; </p><p><br /></p><p>Conversely, there are types that are usually gray so you will have more trouble finding them dark.&nbsp; </p><p>[ATTACH=full]359746[/ATTACH] [ATTACH=full]359747[/ATTACH] </p><p>I&#039;m sure none of this as is simple as I&#039;ve suggested here but I also doubt that your black coins are bronze disease survivors.&nbsp; I know a dealer with several of the coins with COS dated reverses.&nbsp; All are dark and shiny.&nbsp; Perhaps they came from a hoard with your pair???&nbsp; I have not seen one of these with silver color but that does not mean they do not exist.&nbsp; Such things require serious studies by real scholars with access to the huge hoards.&nbsp; Such people tend to work at the British Museum and the like but don&#039;t hang around CT, unfortunately. </p><p>[ATTACH=full]359748[/ATTACH][/QUOTE]</p><p><br /></p>

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