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<p>[QUOTE=&quot;expat, post: 8348636, member: 111067&quot;]NO. Strike doubling is another way of saying machine doubling (no added value)</p><p>Until 1989/90 the mintmark was punched by hand in to the master die after the die was hubbed. When the MM was incorrectly punched&nbsp; and had to be re-done, this is an RPM When you see the same flat, shelflike appearance on both date and mintmark, you can be pretty sure that what you have is machine doubling.</p><p>Study what doubled dies and RPM&#039;s look like on these sites</p><p><a href="http://varietyvista.com/" target="_blank" class="externalLink ProxyLink" data-proxy-href="http://varietyvista.com/" rel="nofollow">http://varietyvista.com/</a></p><p><a href="https://doubleddie.com/" target="_blank" class="externalLink ProxyLink" data-proxy-href="https://doubleddie.com/" rel="nofollow">https://doubleddie.com/</a> there is some good reading on here about the minting process and how dies are made. Invaluable if you are concentrating on varieties[/QUOTE]</p><p><br /></p>

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