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 Replies: 9 / Views: 6,245 |
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Valued Member
United States
442 Posts |
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Pillar of the Community
United States
648 Posts |
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Moderator
 United States
23522 Posts |
Almost certainly MD; there are no known 1923-P's with doubling like that.
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Valued Member
 United States
442 Posts |
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New Member
United States
2 Posts |
What is MDO. I looked it up in the Cherry Pickers Guide and dont see an evaluation like that. I am new to coins so please be kind. I was intersted in this post also as I am trying to learn how to grade coins. |
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Moderator
United States
23522 Posts |
Welcome to Coin Community, coincurbstompin. I certainly hope it isn't your collecting goal to ever curbstomp a coin.  " DDO" is short for "Double Die Obverse;" if you look at the doubling on the coin Voshus007 posted - particularly the date - you'll see what it (sorta) looks like. That is actually Machine Doubling (MD), which happens when the die jumps/bounces during the striking process. Die Doubling happens when what's called the Working Hub (the tool that presses the coin's design into the die) strikes in two different places during separate hits (it used to take more than one strike to create a die). The features of the coin are therefore doubled and all coins struck from that die will show the doubling to one extent or another. Die doubling is considered a Mint error of interest, but Machine Doubling is just an artifact of the minting process. It happens frequently, regardless of what die is in use, and doesn't really generate interest except for extreme examples. Of course, it's not listed as a variety for those coins which have designated varieties. |
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New Member
United States
2 Posts |
Thanks for the reply super dave. I do not think I will curbstomp any coins especially ones I like. The explanation of MD was very good. I have never heard of that one before. Now I now a DDO might be a MD. Thanks again for the reply. |
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Pillar of the Community
United States
2480 Posts |
Voshus-- congrats on your new job, how perfect for you!
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New Member
United States
7 Posts |
I now understand the difference between a DDO and a MD.... but here is the next question: How can you tell the difference. Because to my untrained eyey, they look SO terribly similar. Thanks! |
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Pillar of the Community
United States
992 Posts |
There's a good example of it on VAMworld in the discussion forum.
"so you think you have a doubled die?"
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Replies: 9 / Views: 6,245 |
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Posted 05/30/2013 9:39 pm
