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<p>[QUOTE=&quot;desertgem, post: 1651296, member: 15199&quot;]Is the diameter determined by the dies/collar? or by measurements taken by sample afterwards. I have always assumed the former, but don&#039;t know if the end product is measured or examined. The reason I ask is that it has been widely said that the striking of a coin produces a good amount of heat, so is it possible that the planchet/coin is in a heat expanded state when it is limited by the collar device and then decreases a small %, when it is measured in a room temperature environment? Thus a slightly smaller diameter might be normal. The best I have is a digital caliper to .01 mm and on 4 Au or better Morgans within reach, the diameter was&nbsp;&nbsp; 38.14,&nbsp; 38.10, 38.07, and 38.09.&nbsp; The only calibration that I have is to set at 0.00, but I will try to find a calibration standard that is calibrate to a certain temperature, but if anyone else has a laser or lab device and standard, please measure some $, and see what you get. </p><p><br /></p><p>Jim[/QUOTE]</p><p><br /></p>

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