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<p>[QUOTE=&quot;justafarmer, post: 2155851, member: 3926&quot;]I use TurboCAD purchased many years ago off the shelf from Best Buy. The coordinate data is maintained in an Access Database. Usually just query the database for point (A) in relation to origin 2. It returns a list of varieties for that year sorted from closest to furthest to the coin I am trying to attribute. About 90% of the time the variety will be one of the top 3 on the list and 99% top five. If I can&#039;t attribute within the top 10 on the list it is almost always a variety not yet entered into my database. Well for Lincoln Cents anyway. Coin designs where the target area for the mintmark is small and confined - the deviation of mintmark placement is not as significant from die to die. For these rotation and point (B) and point (C) info need to be added to your query.[/QUOTE]</p><p><br /></p>

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