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Why Do Certain Coins Grade Higher?

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CoinAdvocate's Avatar
United States
141 Posts
 Posted 10/17/2024  11:25 pm Show Profile   Bookmark this topic Add CoinAdvocate to your friends list Get a Link to this Message Number of Subscribers
Hey all,

I'm trying to teach myself the important skill of grading. One thing I can't seem to wrap my head around is this: why do coins of low mintages seem to be given a 'pass' and graded higher generally while newer and higher minted coins are graded much harsher? Shouldn't uncirculated mean uncirculated regardless of the coin?

Example AU-55 1850-O Dime
https://www.ngccoin.com/certlookup/6510780-010/55/

If this was a Morgan, it would not grade out this high.

Can someone explain this to me, or if I'm way off the mark explain how?

Thanks,
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Sap's Avatar
Australia
16805 Posts
 Posted 10/17/2024  11:49 pm  Show Profile   Bookmark this reply Add Sap to your friends list Get a Link to this Reply
Welcome to the phenomenon known as "market grading", where scarcer or more collectable coins are treated more generously.

Annoying, yes, especially for someone attempting to learn technical grading.
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spru's Avatar
United States
12477 Posts
 Posted 10/18/2024  04:23 am  Show Profile   Check spru's eBay Listings Bookmark this reply Add spru to your friends list Get a Link to this Reply
Coin type has a lot to do with it and each type almost has its own scale, but the coin you linked seems to be generously graded in any case. I'm sure bias exists because this is still (for now) a human-based process.
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Freespeech57's Avatar
United States
613 Posts
 Posted 12/07/2024  11:31 am  Show Profile   Bookmark this reply Add Freespeech57 to your friends list Get a Link to this Reply
Great question!
Grading is impacted by coin series -common strike issues (overall weak or strong strikes), the "technical grade" of the coin (strike, bag marks, placement of dings, etc), eye appeal, tonining (toning can enhance the eye appeal of a coin or hide imperfections), and other general attributes of a coin.

Although experience leads to greater consistency, grading is not perfect and is somewhat subjective within the margins of a grade (hence some coins get a CAC sticker and some do not and some a gold sticker, under graded)
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Coinfrog's Avatar
United States
94367 Posts
 Posted 12/07/2024  11:39 am  Show Profile   Bookmark this reply Add Coinfrog to your friends list Get a Link to this Reply
I think Sap calls it.
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