Never heard of it but thats because I'm not up on tech. I'll try that next time.
I did a google search and found several right here on CT.
Post #2 https://www.cointalk.com/threads/has-anyone-ever-used-ncs-what-were-your-results.190343/
That is not a given. More than one member here have experienced a straight graded coin returned with a details grade after conservation by NGC....
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