Another question from a beginner

I understand mint errors to a point. But my question is about MD. If the coin is stuck at the mint and there is a error because of some reason. Wouldn't machine doubling occur at the mint? After it leaves the mint no other machine can cause the doubling right. So why isn't machine doubling listed as a mint error? Dont it have to occur at the mint? Just trying to figure out the difference.
Thanks for the help in clarifying it for me

 

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It is a mint error. It is extremely common and not even remotely rare.

 

Ok thank you

 

It does occur at the mint and it occurs in the press, but it occurs due to lateral movement of the die after the "moment" of strike and anything that happens after the strike is damage. Exception would be a second strike from another cycling of the press.

 

http://www.error-ref.com/part_iv__die_errors/

 

Some great reading for us beginners !

 

If you think about it, the 1955 doubled die isn't an error. It was a mistake when it was made, but it deliberately shipped out due to a coin shortage. 1937-D 3-legged Buffalo is only an error if there are planchet defects, or something like that, but the die was properly prepared, just over polished to remove a clash. The clash is more of an error than the over polishing.

 

I think that the 55 DD was made and mixed with so many others that were normal, that the decision was made to let them go anyway rather than destroy the accumulated quantity, the die would have been destroyed if discovered before any minting with it had occurred.

 

Yes relatively speaking they are all, so called errors but in terms of value the more common the type of error the less value and appeal they will have to collectors. Machine doubling,Die deterioration doubling and Die clashes are all very common. Although Die clashes can bring a premium depending on the severity of the clash to certain collectors.

 

But if something is released by the mint, with a known defect, is it an error?

 

If it occurred in the normal minting process, I would say yes, much more than the "specially minted illegal coins" that mint workers made for their own use, including stampings on nails, wrong planchets, etc.

 

This is why some of us like PSD - post strike damage - instead of PMD.

If the mint drops a 1 ton balistic bag and scoops them up with a shovel, why does it matter if it happened at the loading dock or outside the gate?

 

Thank you for that answer @Conder101... I had been wondering how mechanical doubling happened, and that explanation summed it up nicely

 

Thanks to all who responded to this post. I learned a lot from reading the comments. Thanks again.