1982 D Half

The 9.

Looks like DVD ( since the term is frowned upon, how about Die Shift Doubling - DSD?)

My question is, why only on the 9 and no sign of it on any of the surrounding features? Are not both the die and coin solids?

 

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could be die deterioration doubling, i had a nickel with 1 element doubled attributed, responce was as follows.... The doubling that you see and described is a common form of doubling known as “die deterioration doubling.”It is caused when the dies used to strike the coins are kept in use for too long a period of time.When the dies strike the planchet to form a coin, the planchet metal is pushed into the cavities of the die to form the design.The constant movement of planchet metal across the surface of the die causes the die surface to wear and erode as time goes by.The eroded areas on the die are depressed, but on the coins they appear as raised areas.Since the greatest erosion is around the design elements such as the letters, date, etc. the new raised areas resemble doubling.

so the "9" could be at an later stage of deterioration then the other elements....just my opinion

 

Mechanical doubling has been known to occur on isolated elements, so it wouldn't necessarily be out of the norm to find it on just one digit in the date. As to exactly WHY that happens, I am not sure.

 

Here is the link to error-ref on isolated machine doubling:

http://error-ref.com/isolated-machine-doubling.html

 

Thank you jay, but 9 is not a MM.

 

Read: most often encountered, but not exclusively limited to.

 

Yet, this one didn't involve the MM, so any limitation is irrelevant, do you not agree?

 

All I am saying is that a coin can have isolated mechanical doubling that does not occur on the mintmark.

 

Well then ... explain how no element, to either side nor above or below was affected?

 

Look up the definition of isolated. The 9 is isolated, meaning nothing else is affected.