Reply to Thread

Message:: [QUOTE="justafarmer, post: 544266, member: 3926"]I have posted a picture for illustration purposes along with a short explanation of my process for using CAD as a variety attribution tool. The picture may be hard to see – when formatting a TCW into a JPG file the image tends to degrade. Step 1 - Establish the Y axis with a straight line along the west side of the numeral 1 of the coin’s date Step 2 - Establish the X axis by pulling a perpendicular line off the Y axis at the first tangent point on the south side of the last numeral of the coin’s date. Step 3 - Establish Line A by pulling a perpendicular line off the Y axis at the first tangent point on the North side of the mint mark Step 4 - Establish Line B by pulling a perpendicular line off the Y axis at the first tangent point on the South side of the mint mark Step 5 - Establish Line C by pulling a perpendicular line off the X axis at the first tangent point on the west side of the mint mark Step 6 - Establish Line D by pulling a perpendicular line off the X axis at the first tangent point on the East side of the mint mark. Step 7 - Find the XY coordinates of the line intersections – points (AC, AD, BC, BD) Step 8 - I query my coin variety database for examples of the same date and mint mark with the same 4 coordinates based on a tolerance of +/- 1%[/QUOTE]