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<p>[QUOTE="Valentinian, post: 2935224, member: 44316"]There are far more coins with lead globs in them than most collectors think. We don't want them so dealers don't buy them to put on vcoins or take them to shows. You will find some in very large lots that have had good coins removed. I have inspected the collection of a old friend who, years ago when viewing very large lots, purposely selected lousy coins (mostly 4th century Roman) with lead globs in them to illustrate the phenomenon. He had hundreds (all worthless, from my standpoint), but I'm sure they cost almost nothing. </p><p><br /></p><p><br /></p><p><br /></p><p>The government issued coins with some lead in them. Cope analyzed many tetrarchal and Constantinian-era coins and some had over 10-12% lead. Sometimes the lead mixed well, sometimes not. It is small percentage of coins that dramatically show when the mixing was poor. When a glob a lead was in the flan, sometimes it corroded away. (Usually in the process it turns white first.) </p><p><br /></p><p>[ATTACH=full]713605[/ATTACH] </p><p><br /></p><p>This is one of the finest coins I have seen with obvious lead globs. It is an AE30 Diadumenian (217-218) from Laodicea ad Mare in Seleucia Pieria. At 11:00 on the obverse and elsewhere you can see the white and empty pockets where lead was and is now missing. </p><p><br /></p><p>I think the explanation of the OP coin is that it was made of poor metal with some lead globs in it, which, over time, corroded away. The fact that particular example had lead in the center is coincidental.[/QUOTE]</p><p><br /></p>
[QUOTE="Valentinian, post: 2935224, member: 44316"]There are far more coins with lead globs in them than most collectors think. We don't want them so dealers don't buy them to put on vcoins or take them to shows. You will find some in very large lots that have had good coins removed. I have inspected the collection of a old friend who, years ago when viewing very large lots, purposely selected lousy coins (mostly 4th century Roman) with lead globs in them to illustrate the phenomenon. He had hundreds (all worthless, from my standpoint), but I'm sure they cost almost nothing. The government issued coins with some lead in them. Cope analyzed many tetrarchal and Constantinian-era coins and some had over 10-12% lead. Sometimes the lead mixed well, sometimes not. It is small percentage of coins that dramatically show when the mixing was poor. When a glob a lead was in the flan, sometimes it corroded away. (Usually in the process it turns white first.) [ATTACH=full]713605[/ATTACH] This is one of the finest coins I have seen with obvious lead globs. It is an AE30 Diadumenian (217-218) from Laodicea ad Mare in Seleucia Pieria. At 11:00 on the obverse and elsewhere you can see the white and empty pockets where lead was and is now missing. I think the explanation of the OP coin is that it was made of poor metal with some lead globs in it, which, over time, corroded away. The fact that particular example had lead in the center is coincidental.[/QUOTE]
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