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<p>[QUOTE=&quot;messydesk, post: 2464872, member: 1765&quot;]Assuming both dies were moved from the medal press to the coining press at the same time, the only differences might be striking quality, maybe the rims, maybe the reeding.&nbsp; The &quot;fabric&quot; of the coin is also something to take into consideration, although that is something that is hard to explain and needs to be observed over time.&nbsp; There might also be contact marks with other coins.</p><p><br /></p><p>The thing is, the reverse die being undated could be used for proof production for several years in a row.&nbsp; I know this was the case for Morgan dollars from late 1878 through 1880, and there is a unique diagnostic for these.&nbsp; Other researchers have documented other diagnostics for proof only die marriages for other series.&nbsp; </p><p><br /></p><p>When buying a 19th century coin that could be either proof or business strike, learn the diagnostics, if there are any.&nbsp; If there aren&#039;t any, make sure the coin has a grade guarantee.&nbsp; Without those two, just assume the coin is the cheaper of the two.[/QUOTE]</p><p><br /></p>

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