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<p>[QUOTE=&quot;john65999, post: 8056646, member: 111931&quot;]ALTERNATIVE THEORY II: </p><p><br /></p><p>The arcs are too perfectly concentric and too evenly spaced to have been caused by any hand finishing of the die. The assumption is incorrect that any machining marks on the blank die face will be 100% eradicated by the hubbing process. And even if the die was subjected to some post-transfer marks, those marks would affect the fields differently than the tops of the letters. That the circular marks are consistent up and over fields and devices alike is proof that they originated on the hub or die BEFORE it was hubbed. </p><p>aving over-struck thousands of coins, I have observed that marks on the host coins will persist to a greater degree than one would think, even after multiple strikes at very high tonnage. Even the subtle difference between a burnished blank and an un-burnished blank is evident after striking. Even a slight difference in planchet surface texture can show through after striking or hubbing. </p><p>&nbsp; </p><p>Some early commemorative coins have a different type of lathe lines. Master hubs can have lathe lines if there is some &quot;slop&quot; in the Janvier reduction machine. </p><p>&nbsp; </p><p>Here is a US Mint medal with some lathe lines that I believe are from the reduction process. This picture doesn&#039;t show them very well, but they are there (across the date area). One characteristic of lathe lines from the reduction process is that the lines tend to trail off of some of the devices (such as corners of letters, etc.). This particular 34mm medal suffered from a rather &quot;fuzzy&quot; reduction which may have used an original 3&quot; medal instead of the usual larger galvano. Note the (lack of) sharpness of the date digits compared to the &quot;D&quot; mint mark (which would have been punched into the die after the hubbing).[/QUOTE]</p><p><br /></p>

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