2007 D Nickel

Looks like you've got Machine Doubling.

J, Machine Doubling looks entirely different from die doubling. In a doubled die image, they are typically of the same height as the devise and have a natural shape similar to the actual devise. On Machine Doubling the secondary image is a flat image and typically much lower in profile height than the original devise. Imagine taking a razor and slicing off the devise as close to the field as you can and moving it ever so slightly. The remaining image from where you moved it would look very similar to Machine Doubling. I once heard someone here describe it as " the devise has slide off of it's base" and that seemed like a very descriptive analysis.

This is caused by what I like to call die chatter. Picture in your mind the die hopping ever so slightly as it stamps the planchet. This hop is what caused the Machine Doubling. Maybe not the most technical description, but I hope it helps.
Jim

This is Die Deterioration Doubling caused by die wear. VERY common on nickels.