That is an uber-cool microscope!
They all look like machine doubling to me -- but I am not sure.
The Lincoln cent WE T and TRUS looks the most like true doubled die.
Here's the thing to do. Get a copy of the Cherrypickers Guide. The electronic version is only $14. This guide gives all the known US minting varieties, including doubled dies. There are close-up pictures of the doubling, and approximate values Don't waste your microscope time on coins that are not in the Cherrypickers Guide. Hope you find plenty of good ones!
Guide on Amazon:
Hi there!! Personally I agree with Paul, however, USE THAT MICROSCOPE ON EVERYTHING! That's how new discoveries are made and they are being discovered all of the time!!
Very cool pieces by the way. I haven't been able to physically or mentally spend any change for over 10 years. You can imagine what my room looks like!!!