1948D Benjamin Franklin RPMM????

[errorist]

Is this a repunced mint mark?? Sure looks like one to me..

[DWLange]

That is just strike doubling, aka mechanical or machine doubling. It has not added value.

[errorist]

How is it it is the only place on the coin that it appears? Usually with Machine Doubling it is in other places..

[DWLange]

Since the mintmark was the only feature of the die punched into it rather than being part of the hub, it tended to have steeper sides that were more susceptible to being displaced as the dies withdrew from one another.

[errorist]

7 hours ago, DWLange said:

Since the mintmark was the only feature of the die punched into it rather than being part of the hub, it tended to have steeper sides that were more susceptible to being displaced as the dies withdrew from one another.

Could be but it looks like whoever punched the mint mark did it twice. The second strike wasn't quite over the first strike... 

[Mohawk]

4 hours ago, errorist said:

Could be but it looks like whoever punched the mint mark did it twice. The second strike wasn't quite over the first strike... 

If DWLange says it's strike doubling, I'd trust him.  He's the Research Director of NGC and one of the most knowledgeable people regarding coins you'll encounter anywhere.

[errorist]

15 hours ago, Mohawk said:

If DWLange says it's strike doubling, I'd trust him.  He's the Research Director of NGC and one of the most knowledgeable people regarding coins you'll encounter anywhere.

He said strike doubling?? I missed that..