Insulator Grading

By Karl Elder; posted July 25, 2013

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I have been searching and can't find information on Grading. Mint no flaws, Near Mint maybe flea bites or ding's? A Bruise how big and what level? I would appreciate any information on this Topic. This CD 317 has a Bruise in the wire Groove displays very well. Thanks, Karl Elder karlelder@yahoo.com

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