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 Replies: 9 / Views: 2,278 |
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Pillar of the Community
Canada
1472 Posts |
Can someone please explain how this coin comes to be as it is? What keeps it from wrapping around the die? Is it struck multiple times? http://mikebyers.com/21271905.htmlThanks for any info. |
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Rest in Peace
United States
3039 Posts |
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Rest in Peace
United States
1943 Posts |
These are fun to try to figure out. Here is my assessment. The bottom photo where the center of the coin looks normal and sharply struck was the side stuck to the reverse die. The other side with the reverse image mirrored was struck thru another coin stuck to the obverse die and is the brockage. I think what kept this from wrapping around the die is this coin was stuck to the anvil die. For this to happen the collar had to stay stuck in it's retracted position around the anvil die and it blocked the coin from wrapping around it. Reverse dies were not always the anvil die but in this case it was. The other coin stuck to the obverse die would have been the die cap that wrapped around the die since this would have been the hammer die. Since both coins were stuck to the dies they were both struck multiple times. The larger features on the brockage is because the coins expanded out with each strike causing the features (letters, numbers and design) to get wider and shallower. The features on the side against the die do not expand because the die doesn't expand. So the side against the die gets a strong sharp strike. This is a beautiful coin. I think you will find anvil die caps are rarer than hammer die caps because the collar must be stuck out of position and the feeder fingers must fail to dislodge the coin. I know I'm reading a lot into this coin, let's see what others say.
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Pillar of the Community
 Canada
1472 Posts |
Thanks pyrbob, I like your explanation and it makes sense to me. I would think the other coin must have been the first one stuck on the dies? Also, would it require the first strike of this one to be in collar? The two die caps must start extremely close...within a couple strikes apart?
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Rest in Peace
United States
1943 Posts |
Yes, I would say the two caps started close together. They would either be at the same time or with the reverse right after the obverse. If the reverse were first there would be an under strike of the obverse design before the brockage occurred. I don't think the collar ever struck this coin. I don't see any sign of a rim on it. It is harder to tell on plain edge coins. Coins with designs on the edges (letters, reeds, ect.) are easier to tell.
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Bedrock of the Community
United States
62064 Posts |
Seems more logical to think that the coin in the images was the single die cap on the lower anvil. The design on the reverse if mirrored strike through the planchet. Note how the devices are larger than the edge on the next to the die. It is not a generic cap because it just happened and came off the die not destroying the devices coming through. They may have been on coin that was mirrored and then the die cap came loose. Thus the mark at 3:00 on the capped die reverse side.
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Pillar of the Community
Canada
1472 Posts |
Thanks very much for your comments. I posted this because I have a raw coin which probably was a result of the same process but in this case the anvil die was the obverse. Click on bottom right corner of thumbnails to see larger photos. http://a03-b03.mypicturetown.com:80...n1y4edEL3RvkEdited by Zonad
08/15/2010 6:58 pm
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Pillar of the Community
United States
2737 Posts |
First of all, the slab diagnosis is wrong (or at least unsupported by the available evidence). As far as I can tell, this is a centered, first-strike brockage/broadstrike. There is no evidence that I can see that would indicate a planchet was subsequently fed in on top of it and the two were struck together.
Error coin writer and researcher.
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Pillar of the Community
Canada
1472 Posts |
Mike,you're saying the Slabbed coin was only struck once? Do you think the same for my Canadian coin?
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Pillar of the Community
United States
2737 Posts |
In both cases I see evidence for only one strike. If either coin had acted as an anvil die cap after the creation of the brockage, the center of the brockage would have been far less clear and far more expanded.
Another indication of a single strike is that the fine radial grooves that extend from the edge of the field from the die-struck face to the edge of the coin are continuous and uninterrupted. If more than one strike was involved, you'd see a slight disruption in the grooves and most probably the formation of concentric strike lines.
Error coin writer and researcher.
Edited by mikediamond
08/16/2010 12:14 pm
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Replies: 9 / Views: 2,278 |
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Posted 08/15/2010 07:05 am
