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<p>[QUOTE=&quot;gboulton, post: 1053050, member: 27043&quot;]The 1971D is one of the dates/mm known to have been struck in silver by mistake.&nbsp; The other, if memory serves, was the 77 D (probably on planchets meant for the bicen. silver sets)</p><p><br /></p><p>However, those coins were struck on 40% silver planchets, not 90%.</p><p><br /></p><p>As suggested above, the best way to be sure is to weigh the coin.&nbsp; 12.5g is 90% silver, 11.5g is 40% silver, 11.34g is a common clad coin.[/QUOTE]</p><p><br /></p>

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