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Message:: [QUOTE="ToughCOINS, post: 8050727, member: 20480"]All metalworking processes have made significant strides out of necessity in order for the USA to remain competitive.  Despite that, the equipment still is not perfect, and never will be. The quality of the machinery may have improved enough to fool us, but every process has some "weakness" that makes a different process preferable for some workpieces.  Those weaknesses are likely the areas we should be targeting to identify the "tells" you seek. One weakness I can think of regarding laser ablation is that it probably concentrates too much energy for too long in sharp interior corners of a die where a reversal in direction is required to avoid a new start of the laser.  That may result in some flowing of overheated material in such sharp corners.  That sharp interior corner in the die might be found at one of the 3 acute exterior corners forming the arrowheads either side if the date, but I'd think a sharply struck nearly mint state example may be necessary to do that. Getting ready for Baltimore, so I'll have to think more about this another time.  If you'll be there, please stop by.  I'll be at table 556.  - Mike[/QUOTE]