1940 D Nickel. What Do Ya Think

All I see is some MD and Die Deterioration,
please explain what error you are seeing.

Yep, sorry, this would be MD.

Take a good look at the 'E' for a moment. I see that the MD on this letter is on the bottom horizontal bar of the E moving up, and the top bar has MD moving down, but not on the middle bar. now notice how much thinner then bottom and top bar is compared to the middle bar (which is normal thickness)

I agree with above. Machine Doubling.

All I saw was green corrosion and what's happening in that end bay near the mint mark? PMD ?

I stopped listing what I thought I was seeing in my posts on purpose...if it's easier the other way I can start leading with what I believe. But asking what other see I stead of just stating what I think seems to give me much more helpful info.. in things I may not notice or know to look for. And also I think that when I state this is a (insert error name here). The replies are much shorter. Just a quick no your wrong.. obvs. When I post as a question, it seems to be taken a more of a teaching opportunity by others that respond. Which I really find helpful. And Dearborn.. ty..it's the serif on the e that really got questioning this one..I didn't notice the center bar of the e though and def see what your saying