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<p>[QUOTE=&quot;robp, post: 24876291, member: 96746&quot;]Nothing to do with counterfeiting. From the end of the 19th century until the middle of the 20th, coins illustrated in auction catalogues had a wax impression made and casts made from this which were used to produce the image.&nbsp; Sometimes, the wax impression didn&#039;t come away cleanly, leaving traces on the coin. These small pieces of missing wax then showed up in the plates, which is a good means of confirming a coin&#039;s provenance. To demonstrate, here is a Charles I halfcrown with wax on the obverse. There is also a blob of wax on the reverse which also shows in the plate image.</p><p>&nbsp;[ATTACH=full]1596889[/ATTACH]</p><p><br /></p><p>And here is an image of the plate in Hamilton-Smith 1919 sale, lot 56, where the thin wax line is visible.</p><p>[ATTACH=full]1596890[/ATTACH][/QUOTE]</p><p><br /></p>

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