1957 D Double Die

I am cataloguing my coin collection and came across what appears to be a double die on the date. I've provided a pic both in Natural light and Artificial (from my MicroCapture Pro). I can't find anything on a doubled date...only a doubled mint mark. Anyone want to weigh in?
Natural Light


Artificial Light

 

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awesome.

 

Hi, sorry , it is MD, best seen on the 1 and the vertical leg of the 7. If it was a doubled die, the width of each would be wider than a non-DD, as you would have one partial ( first hubbing) and one full width ( second over lying hubbing). On your photo , you can probably see that each section of the leg is narrower than a normal one rather than wider. Welcome to the forum, Jim

 

There is also a "Plugged B" in LIBERTY.

Chris

 

Your coin is "machine doubled" (common) no extra value but nice teaching coin. There is a die chip in the "B" much neater. Keep looking and Good Luck!

 

I'm relatively new....and haven't quite got all the lingo and acronyms down.... what does MD stand for? I was using another sample as reference and they seem markedly different... this was my comparative coin

 

what is the difference between machined doubled and double died.

 

@mapcoin

MD stands for "machine doubling". Oftentimes people will use the abbreviation assuming that everyone else knows what it means. Machine doubling may also be called strike doubling, mechanical doubling and on rare occasions, ejection doubling.

Chris

 

Machine doubling occurs during the striking process and is caused by a slight back-and-forth movement of the die. A true doubled die occurs during the hubbing process when the working die is made. The dies usually need to be struck a second time to ensure that the design is impressed completely. If the working hub and the working die are not aligned correctly, a doubled die will occur.

Chris

 

Thank you all for your help... there was a comment about the "plugged B" that was actually on both coins... I've found a couple that seem to have "Extra" material.. like between the b and e... and in loop of number 9... someone suggested they were neater... is there some value in this type of coin?

 

Decades ago these things were all the rage. Not so much now.

 

And then I found this... the 7 is so much lighter than the other numbers

 

What do you call something that's flat and shelf-like?

 

Could be a greaser or just a worn-out die. They overused the dies until they DIED.

 

I know I should be able to come up with a witty comeback... darn

 

Thanks for your help and tutorials...

 

That is the most extreme case of machine doubling on the date I've ever seen. I'd keep it for myself just cause it looks cool.

 

Between the b and e is usually referred to as a "BIE" error, it is a die chip as is probably a filled 9.

 

Two coins, two die chips in the same location in the "B's". Common but nice find.