1987-D DD? 1 1

[Kevin Simpson]

                  I'd like to know from the experts if I'm seeing a double in the mint mark or not. I do know that there is machine doubling going on under the mint mark but I also think I  see doubling in the D. Am I correct or just looking too deeply? Thank you in advance for all of you incites. I tried to enlarge the image in order to see what I think I see better.

[Kevin Simpson]

 Here's a closer look at the mint mark

[Oldhoopster]

It's called split plate doubling. The copper plating split during striking exposing the zinc core, so it's not really doubling.

[bsshog40]

Edited. Hand punching stopped in 1989. 

Edited April 12, 2021 by bsshog40

[DWLange]

You could have D/D, but it would be the result of a DDO rather than a RPM. The poster's coin is, as noted above, just plating separation.

[Kevin Simpson]

              Thanks for that information I just learned something new. That's what I like about this site, everyone is so helpful. It also saves the newbies quite a bit of money by not having coins sent in to be graded. great job guys!