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<p>[QUOTE=&quot;limmle, post: 5387123, member: 113081&quot;]I am hoping someone can give me some advice on bronze disease in billon coins as opposed to bronze. I picked up a Uranius Antoninus tetradrachm at an auction about 12 months ago. I paid more than its worth, but I&#039;ve got an obsession with collecting rare emperors when the opportunity presents itself. I noticed last week some spots of BD (they rubbed off fairly easily) appear s on both sides of the coin. it&#039;s been about 7 days and nothing has reappeared yet but Im very concerned. The coin was not cheap and I&#039;m very worried.&nbsp; Do I treat BD in billon any differently from bronze? Any suggestions on what I should do?</p><p><br /></p><p>I have picture of the coin, but you can&#039;t see the BD as I have removed it. They were only very small points of green, about 4 or 5, randomly placed on the obverse and 1 on the reverse. Any advice would be appreciated.</p><p><br /></p><p>[ATTACH]1231251[/ATTACH] [ATTACH]1231252[/ATTACH] </p><p>Uranius Antoninus (Usurper 253-254)</p><p>billon tetradrachm 253-254 Emesa RPC IX 1876var. Obverse: AYTOΚ COYΛΠ ANTωNINOC CЄ (AUTOK [=IMP] SULP ANTONINUS SE [=AVG]) Laureate, draped and cuirassed bust of Uranius Antoninus to right, seen from behind. Reverse: ΔHMAPX ЄΞOYCIAC (DEMARCH EXOUSIAS [= TRIBUNICA POTESTAS?]/ ЄΜΙCΑ / S - C Eagle with spread wings standing facing, head to right and holding wreath in beak.[/QUOTE]</p><p><br /></p>

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