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 Replies: 19 / Views: 991 |
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Bedrock of the Community
United States
94367 Posts |
Why bezel prep? Why not ex-bezel?
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Pillar of the Community
United States
2003 Posts |
In regards to weight, 26.36 grams would be normal for a Morgan dollar in the F to VF range. I think that the jewelry bezel is a likely theory. |
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Pillar of the Community
  United States
8775 Posts |
Quote:
Why bezel prep? Why not ex-bezel?
I was just saying that they were prepping it for the "home-made" bezel that Hondo mentioned. They may have used wire or string to go around the coin in the groove made. A typical bezel wraps around the rim. -makecents-
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Pillar of the Community
United States
8775 Posts |
Quote:In regards to weight, 26.36 grams would be normal for a Morgan dollar in the F to VF range. Tolerance is about a tenth of a gram on a Morgan. This, in my opinion, would be light unless it was in or near good condition. I'll put up some full coin shots tomorrow, as I should have to begin with. -makecents-
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Pillar of the Community
United States
2003 Posts |
@makecents, Tolerance figures pertain to freshly minted coins. It does not account for weight loss due to wear. In my experience, Morgan dollars worn to the point of grading VF are usually in the 26.5 gram range and worn to F grade they are about 26.25 grams. In grades from MS to XF they seem to retain the 26.73 gram weight |
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Pillar of the Community
United States
8775 Posts |
-makecents-
Edited by -makecents-
12/10/2023 10:44 pm
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Bedrock of the Community
United States
74556 Posts |
Interesting. Might have been grounded down or something.
Errers and Varietys.
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Bedrock of the Community
United States
10982 Posts |
The reason reeding was added to coins was to make shaved rims easy to identify and prevent theft of metal. Shows up well here!
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Pillar of the Community
United States
2757 Posts |
Even a common year for Morgan jewelry pieces as well.
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Bedrock of the Community
United States
36826 Posts |
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Pillar of the Community
United States
8775 Posts |
Quote:
The reason reeding was added to coins was to make shaved rims easy to identify and prevent theft of metal. Shows up well here!
Yes sir, I'm familiar with the reason for reeding and appreciate your input for others. -makecents-
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Pillar of the Community
United States
8775 Posts |
Quote:
Even a common year for Morgan jewelry pieces as well.
Typically, the year meant something to the person making jewelry, nothing to do with any rarity. -makecents-
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Pillar of the Community
United States
8775 Posts |
Quote:
Post mint damage.
I thought that was an understood, guess I should have stated this.... PMD-makecents-
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Pillar of the Community
United States
4233 Posts |
On the weight issue, I thought some math might be fun. The coin weights 26.36g instead of 26.73g nominal weight. So it is 1.4% light. A Morgan $1 is 38.1mm in diameter and 2.40mm thick. Volume = pi r^2 * h, so the volume of an idealized Morgan $1 is 2736 cubic mm. Therefore if this coin has lost 1.4% of its volume, it's missing 38 cubic mm. The ground-out channel in the rim appears to be about 1mm wide (since the overall thickness is 2.40mm, that seems reasonable). A 1mm height makes the math simpler. It's basically calculating how much smaller a 1mm tall radius 19.05mm cylinder would have to be in order for the volume to be reduced by 38 cubic mm. The answer is 0.32mm. So a 1mm wide channel one-third of a mm deep easily accounts for the weight loss.
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Pillar of the Community
United States
8775 Posts |
Thanks, kbbpll! Math was my worst subject. growing up.  -makecents-
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Replies: 19 / Views: 991 |
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Posted 12/10/2023 8:05 pm
