Machine Doubling. You can tell because it looks like a part was flattened. It also doesn't hold the same shape as the numbers in some spots.
Some good links to bookmark. Characteristics of doubled dies https://www.doubleddie.com/58222.html Characteristics of worthless doubling like MD and die deterioration https://www.doubleddie.com/144801.html How dies are made https://www.doubleddie.com/58201.html https://www.coinnews.net/2014/01/06/how-the-denver-mint-makes-dies-to-produce-coins/
True hub doubling can look like this and that's where the confusion lies. This is flat and shelf like and is machine doubling. Hub doubling will normally have some sort of notching at the base of each number/letter or really fat lettering. Best to hone your skills on the differences and visit www.doubleddie.com where there is a plethora of free info on all sorts of varieties and errors and how to tell the difference between them.
Here is a true DD, note how the left side of each letter is stretched out. Especially the O and D. The left bar of the N also shows a clear split. The first pic is unedited, but the second I added black over the doubled die doubling. Switch between both photos, and note what characteristics you can see. Every one of these sites is worth the time if you plan to look for doubled dies. Doubleddie.com is THE PLACE to go. I do trust that eventually you will have a doubled die fall right into your lap, and with some reading and notes you'll see it from a mile away. Old Hoopster gives good information - no fluff and his posts have helped me immensely.
Thanks so much ya im sure i have a dd somewhere in the thousands of pennys i have been hoarding. Lol ill keep searching lol
