I just spent the last three days (T, F & S) at FUN in Orlando. Among shopping, rubber-necking, and chatting, I also manned our local club table...
I could see this getting an "Improperly Cleaned" grade. Also, I am not at all certain that is a chop mark. It looks more to me like someone...
The first problem you have is that you don't have a known calibration weight to use with your current scale. Acquiring a known calibration weight...
You need a different scale, one more appropriately sized for coins. For example, the US $20 gold coin is roughly 33 grams. Most scales for...
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