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<p>[QUOTE=&quot;mikediamond, post: 770543, member: 1859&quot;]There are only two quarters known that are missing the clad layer on both faces.&nbsp; One is broadstruck and uniface, the other weakly struck as the result of being much thinner than a normal quarter.&nbsp; At best, your quarter was struck on an improperly annealed planchet.&nbsp; When exposed to prolonged heat or excessive heat (it&#039;s not clear which), a layer of copper forms on the surface.&nbsp; The exact physical and chemical mechanism is elusive.&nbsp; If that&#039;s what you&#039;ve got, it may be worth $50.&nbsp; No point in sending it in to be slabbed.&nbsp; Less desirable possibilities are that it was plated or discolored outside the Mint.[/QUOTE]</p><p><br /></p>

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