Discussion in 'Coin Chat' started by DarkRage666, Dec 2, 2020.
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Eyes, consistent lighting, sometimes a low power loupe, knowledge and experience.
Don't forget "marketing".
used to have coin grading seminars. I hope to go to one someday. I have learned a bit about it from a couple of the PCGS PowerPoint presentations on youtube.
Don't you mean "market grading"?
They also Attribute Mint Errors and Varieties with the same techniques mentioned before. I saw a picture over at NGC where they have a library of reference books for use in attribution.
And one important factor is talking with their co-workers for verification of the attribution.
@Insider would like to chime in on this one?
Too broad a question. Tactics? Some graders start from the back of the box. I use a 7X hand lens and stereo microscope (mostly at 7X). I also us two different light sources, rarely a specific gravity rig, and conservation stuff. Otherwise:
Conder101, posted: "Eyes, consistent lighting, sometimes a low power loupe, knowledge and experience.
Here is a YouTube video showing the process at NGC with a shot of the books.
That's cool thanks for that!
I was told that in the bulk department at one TPG, when someone submits the fresh from the mint stuff like commems and proof Eagles, they don't even take them out of the mint capsule to grade them. They get removed from the capsules later in the process, before holdering them.
Depends on who told you that and what company they work for. I have it on very good authority that at one major service they flip any of the "liners" to see if it gets the higher grade.
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