1971 D Quarter

[JJMonte]

Is this a DDR?

 

 

[Mohawk]

In looking at your coin, I'm thinking that what you have is machine doubling rather than a true doubled die.  If you look at the doubling on your coin, notice the shelf like nature of the doubling.  That is a telltale sign that you have machine doubling.  An actual doubled die looks very different.  If you look at the Variety Plus area of our host's site, you can see pictures of many different doubled dies to compare your coin to:

https://www.ngccoin.com/variety-plus/

I hope that helps!