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<p>[QUOTE=&quot;NPCoin, post: 4854925, member: 5629&quot;]I am going to focus simply on the &quot;double die shift&quot; term you alluded to.</p><p><br /></p><p>As early as 1969 (13th Edition), Yeoman was using the term Dbl Die in the Red Book.&nbsp; Now, this could had meant &quot;Double Die shift&quot;, but I would contend that it had probably stood for &quot;Doubled Die&quot;.&nbsp; Alan Herbert&#039;s 1974 book <i>The Official Guide to Mint Errors</i> identifies these errors as &quot;Doubled Die&quot;.&nbsp; I have Spadone&#039;s 4th Edition from 1967 and he certainly uses &quot;Double Die Shift&quot;.</p><p><br /></p><p>Now, if Spadone uses the same term in the 1977 edition, then I would contend that &quot;Doubled Die&quot; and &quot;Double Die Shift&quot; may have grown up together just as EF and XF and is simply a matter of preference.&nbsp; That is, if anyone else other than Spadone utilized that term.</p><p><br /></p><p>At least by the fifth edition of <i>The Green Coin Book</i> in 1966, Friedberg was using the term &quot;Double Die&quot; which continued through the 1996 edition of the catalog.&nbsp; The 1973 edition of <i>The Official Black Book</i> also utilized the same term.&nbsp; This same term is echoed in the 1971 Krause.</p><p><br /></p><p>Getting desperate to find anything that exactly agrees with Spadone, I have moved on to some more obscure sources.&nbsp; <i>Coin Collectors Digest</i> Vol. 1 No. V (February 1965) references the Lincoln 1955DDO as a &quot;Double Strike&quot;.&nbsp; Yeah...obscure reference...we&#039;ll ignore those next time.</p><p><br /></p><p>Taking a plunge, I checked the index to <i>The Numismatic Scrapbook</i> for 1955 to see what they may have termed the discovery of the 1955DDO (since I found one dealer term it simply as a 1955/1955 in the 1960 volume of said magazine).&nbsp; Lo and behold!&nbsp; In the January edition, there is an article about Mercury dimes.&nbsp; The title of the article is <i>&quot;Double Die&quot; Dimes</i>, however, throughout the article the term &quot;doubled die&quot; is used.</p><p><br /></p><p>At this point, I would contend that Spadone may have been trying to change a well rooted term to his own liking.&nbsp; I cannot seem to find any reference to the use of &quot;double die shift&quot; anywhere else.&nbsp; However, I have hardly exhausted the sources available to research the issue.[/QUOTE]</p><p><br /></p>

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