geeze. Most of the initial varieties are so minor that 'Who Cares?' comes to mind. As for the 1943 D WDDR-023, DDR? Show me the difference between that and strike doubling. flat, shelf like. The only reason to list most of these is for Wexler to publish a new book.
I agree with Treashunt-yawn. What's the fun of finding an error that you need an electron microscope to see. Anyway, with the mechanical process of striking billions of coins, some variations are bound to occur. To those that want to make a big deal about them, have fun and go collect them. My eyes aren't that good.
It's getting to the point where I don't even look at the '09's anymore because of so many DDR's, it's not like trying to find a early DDO or DDR.