What are "Wheel Marks"?

Submitted by JonSullivan on Tue, 02/03/2015 - 07:24

Here is an excellent article on the subject, put out by NGC. It will describe in detail what they are, and how to detect them. http://www.ngccoin.com/news/viewarticle.aspx?IDArticle=4412&Wheel-Marks

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