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 Replies: 8 / Views: 1,046 |
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Forum Dad
 United States
24150 Posts |
I think I understand the whole doubled die thing.... Doubled Die - Doubling is on the die itself so all the coins struck with it have the same doubling. Mechanical Doubling - One of several possible scenarios in the actual striking or ejection of the coin causes a doubled die appearance on a per strike basis. Right? So now what if.... A truly doubled die strikes a planchet, but one of the possible Mechanical Doubling scenarios also happens. With all the mechanically doubled coins out there this has got to happen quite often. Now this true doubled die, doesn't look the same as another coin from the same exact die. Do these consistently and erroneously get dismissed as Mechanical Doubling? Inquiring minds want to know.  |
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Bedrock of the Community
United States
62064 Posts |
Bobby: It is true and I have one that is split right up the middle on a reverse of a Cent. 1 half a doubled die and the other 1/2 the left half is Machine Doubling. I hate when that happens and it can happen. The coin is still a doubled die with Machine Doubling. I find it distracting, but it is still a doubled die. I need to get images of it to show others. But it can happen. |
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Pillar of the Community
United States
7629 Posts |
It's possible that they get dismissed - by those who don't know the difference. ANYONE who knows what a doubled die looks like would immediately notice that both are occurring on a coin. They are completely different in appearance.
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Pillar of the Community
United States
608 Posts |
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Valued Member
United States
288 Posts |
C.C. is right. Mechanical Doubling pushes the metal. Kinda like a ski slope. Double dies usually show as distinct and squared off edges and not like cut metal. Mechanical Doubling also tends to raise the metal above the normal surface. Imagine that when the coin gets struck, it slips. That is going to pull on the metal laterally. Ya get shelf doubling. It tends to slope the metal. It literally moves or pushes it. It does not stamp it. There are many rare coins with Machine Doubling. DDO / DDR are not an exception. Generally they are worth less to a collector. Still collectible, but not the coin an experienced collector would pursue...Unless sick rare. Enjoy. G... |
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Pillar of the Community
United States
2600 Posts |
Gusp, I hope copercoins get in on this one, as I understand Machine Doubling differently. I was taught that Machine Doubling is die hop. The die comes down on the strike and for what ever reason, loose dies or etc, on impact the die bounces in one direction or the other. It does not rise up the full height of the devise, so the doubling is lower and flatter than the original devise causing the shelf effect. when the devise has the ski slope effect, this is ejection die doubling. Anyway, that is how I understand it. Jim |
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Pillar of the Community
United States
3507 Posts |
In fact one of the recently discovered 1969 S DDO cents (They have been known but some have surfaced recently) exhibits beautiful doubling as the die was doubled. It also exhibits Machine Doubling. So yes it can and does happen that both types of doubling are on the same coin. As Coppercoins states, you can recognize both types of doubling. |
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Forum Dad
 United States
24150 Posts |
I thought it was going to be a tougher question.  |
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Pillar of the Community
United States
3507 Posts |
Nope, actually cut and dried:-) A coin that is a variety can also coincidentally have Machine Doubling visible. |
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Replies: 8 / Views: 1,046 |
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Posted 02/18/2008 12:52 pm
