I found a 1970 D looks like a large date. It appears to have a floating roof. https://photos.app.goo.gl/ZdV3E9YLjjQTDcza7
1970-S SMALL DATE business strike versions are the one to look for. And 1969 & 1970 Lincoln Memorial cents are just too common with the "floating roof" from overpolishing the dies.
"When they can't find anything wrong with you, they create it!"
There are no small or large date varieties for a 1970-D cent, so yours isn't a large date, it just "is".
I agree it appears to have a floating roof.
What do you figure the value of this coin is?
I have no idea the value. I found it when looking through my coin rolls last night and today. I also did find a 1969 S with a floating roof today not in great shape but interesting. You are so right about the large and small date, but that is the 1970 S. I thought it was a neat find.
The floating roof anomaly is actually fairly common.... so not much of a premium, if any. Cheers, RickO