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<p>[QUOTE=&quot;2manybooks, post: 393424, member: 8267&quot;]We have been pondering the characteristics of your map, from the perspective of it being highly unlikely that it is an early original. The closeups you posted are helpful. The printing looks like it could be produced by offset lithography. Here is a site that provides nice details of various printing techniques:</p><p><br /></p><p><a href="http://www.mapsofpa.com/article11.htm" target="_blank" class="externalLink ProxyLink" data-proxy-href="http://www.mapsofpa.com/article11.htm" rel="nofollow">http://www.mapsofpa.com/article11.htm</a></p><p><br /></p><p>More significant is the fact that there is no fold line apparent in yours. According to the descriptions of the originals that we have found, they were produced to be included in bound atlases, and had a fold down the center. A folded map could yield the offset reversed lettering you see in the title of yours. But if there is not a fold in yours, the offset must have been present in the image that was copied to make the reproduction.</p><p>Offset lithography could also produce the &quot;stutter&quot; in the compass lines visible in one of your photos. The plate impression can also be reproduced.</p><p>The type of paper it is printed on would also be diagnostic. Before 1806, any map would be on hand made paper, which should show laid and chain lines. A machine made paper will be very smooth and uniform. (With the caveat that later machine made papers were developed that could mimic some of the characteristics of hand made paper.) I know - it is all very complicated. <img src="styles/default/xenforo/smilies/confused.png" class="mceSmilie" alt=":confused:" unselectable="on" /></p><p><br /></p><p>Debora&#039;s suggestion that you contact the original gallery is a really good idea.[/QUOTE]</p><p><br /></p>

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