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 Replies: 104 / Views: 59,757 |
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Pillar of the Community
Canada
8764 Posts |
You always come up with some very good educational info thanks coop.
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Bedrock of the Community
United States
58693 Posts |
Coop always come up with very educational threads. Thank you Coop! We all appreciate it!
Errers and Varietys.
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Valued Member
United States
129 Posts |
Very helpful thank you. Here is my 1961 proof Franklin.    |
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Pillar of the Community
United States
9798 Posts |
Extreme MD on a D MM:  How much squash could a Sasquatch squash if a Sasquatch would squash squash? Download and read: Grading the graders Costly TPG ineptitude and No FG Kennedy halveshttps://ln5.sync.com/dl/7ca91bdd0/w...i3b-rbj9fir2 |
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Valued Member
United States
262 Posts |
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Valued Member
United States
318 Posts |
1964D Jefferson nickel coin roll hunting about a month ago. In hand with 5x loupe and ability to oscillate the angle, I see doubling on everything (including the steps) -- the photo shows enough to get the idea.  I know this is not an FS nickel as the steps are a little blurry, probably from being doubled... so, I might just push my luck and request 10FS from NGC. You know, maybe they'll get a laugh out of it.  |
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Bedrock of the Community
 United States
12359 Posts |
Wow... coop, I am in awe. I can't fathom the time involved in amassing and editing those photos.
And great photography everyone else too. Very impressive!
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Pillar of the Community
Canada
2784 Posts |
wow very well done coop. excellent images lots of work here again excellent. https://www.error-ref.com/machine-doubling/Push doubling: Push doubling occurs when a die bounces off the surface of the coin. question: so does this mean that the reverse die. becomes the striking die. so if the reverse die is in the head. when the striking die causes this bounce. the head is damped. so that it wants to come back to its oringinal resting position. the striking die is still travelling upward. the head is moving downward. when they meet machine damage. but is that not still double struck. the head is retuning with a force. if the dampening tension is great enough. there would be no doubling. when the striking die is exerting more force. than the dampening tensioners can handle. this bounce takes place. "physics" the head as it is returningtowards the ram. so the head is now the striker so would this not be doubled die-ed. I find this very interesting would like to understand this more. coop I would like to know your thoughts or anybody thoughts. |
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Bedrock of the Community
Canada
24882 Posts |
1881 H Canada 1 cent.   |
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Bedrock of the Community
United States
20753 Posts |
Fantastic information. Thanks for this. To bad after a while it gets lost as more and more posts move it to the end. I'd think this would have made a great book. Trying to find all this on utube or anywhere is not easy for us older people. I normally just put such coins in an Album and then forget them.
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Pillar of the Community
Canada
2784 Posts |
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Valued Member
United States
128 Posts |
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Pillar of the Community
United States
7112 Posts |
This Ireland 1990 1 Punt coin has Machine Doubling obverse visible in the date, the country name, and parts of the harp outline (at least I think that's what I am seeing):    |
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Valued Member
353 Posts |
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Valued Member
353 Posts |
Meow just noticed that Monticello itself is doubled on the bottom.
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Replies: 104 / Views: 59,757 |
First Page
Posted 06/07/2018 9:28 pm
