i have found many doubled die reverse 1970's halves, and i would like to find out more about them. some have doubled tail feathers, arrows,and wings. are they common?
Hi and Welcome, Do a search for Ask About Coins. I have an article in the ARCHIVES section on doubled dies on Kennedys. It shows what to look for . Thanks, Bill PS: I don't remember which month it was under.
Considered damaged by whom ? No TPG would body-bag due to mint-made strike issues such as machine doubling. Machine doubling is mint-made.
It is mint made; http://www.pcgs.com/articles/article771.chtml http://www.geocities.com/NCADD/educational1.html
Although Alan's article is ten years old his mention of machine doubling being damage is accurate. Some of his thoughts go back forty years since he states that he was studying these for 30 years nearly ten years ago so some of what is in there is outmoded. Since then people like Mike Diamond have added to the ways that machine doubling damage can occur as a coin is struck. While Alan's scenario is one of them. Damage does indeed happen as the die is retracting from the struck coin. Logically, the damage has to occur during the strike as if it were after the strike, the die could not move the metal around anymore. "During the strike" includes any portion of the strike while the die is still in contact with the coin. So to suggest that it happens post-strike is impossible. In any case, if you read both articles by Alan and by Billy, they call it damage as do most of the rest of us out in the die variety and error trenches. Thanks, Bill
There are no doubled die reverse CONECA listings for the Kennedy series that has doubling on the tail feathers or wings…there are quite a few involving the arrows. If you see doubling on the wings or tail feathers it would most likely be MDD. Machine damaged doubling, most of the time, is not considered collectable or has any value…except for a few people on this forum. http://www.conecaonline.org/variety_listings.html Larry Nienaber
So what you are saying is that anything but a true double strike from a die is considered mint/machine damage. Machine doubling is still the die making contact with the coin but either the coin moves or the die moves? Some ways I consider that as much of a mint error as a double die struck/strike mint error. Is this because one occurs much more often that the other????
I'm not saying that at all. There are many types of Mint errors such as incomplete planchet errors, off-center strikes, wrong planchet errors and others. The difference between machine doubling which is damage and an error is that machine doubling falls within the tolerances allowed by the Mint and therefore is not considered an error. An error coin is one that falls outside what the Mint considers as normal and is a result of the actual mechanical part of minting the coin. Thanks, Bill
