1983-D RPM

Looks like Machine Doubling. It is flat shelf like and reduces the mint mark.

It does look like flat shelf MD, but if you look close it looks like minor upper and lower serfs. The mint mark is kind of fat

What I try to do with anything that is suspect for Machine Doubling is this;

Look at the affected area which might be Machine Doubling. The Machine Doubling typically flows in the same direction on most devices. So, in this case since it looks like the "D" is affected on the top right of the "D", and going SOUTH and WEST, then other devices, like the date might show damage in that general direction.

Nornally if an RPM exists, and you can see that much separation at the top and the first mint mark left enough of an impression on the coin, there should be some evidence of it elsewhere, especially on the lower side of the coin. It's not always the case, but sometimes you get to see a split serif, or the "underbelly" of the other "D".

In this case it looks like part of the "D" simply chipped off the die that strikes the planchets, giving it an almost RPM look.

If you're asking me, then certainly. You have permission to use any of my images of coins for your educational dvd without my permission. Anything I can do to help.
Name's not mike though. It's Bart. Though usually I get called mark, not mike. So that was a change up.
I enjoy when you guys have a good discussion about the coins on the forums, it imparts some knowledge to us newbies.
Thanks for looking at the coin guys. I hope you all have a great day.

That looks great! I'm glad I could contribute something.