As Ruben already stated, it is treated as an abrasion, not wear. It makes perfect sense that roll friction could limit the grade of a coin at...
As a beginner, you are going to make mistakes. That is an absolute certainty. The general consensus of this thread is that you should not be a...
Cabinet/Roll Friction I know you don't subscribe, but the TPG's do.
Please, not another conspiracy theory!
Congrats, it is a reverse of 40
There are a couple RPM's for that date but I know nothing about a large "S" for 1968.
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