Got A Few Different Questions On This 1960 D Jefferson?

Both dies that struck your nickel were experiencing severe Die Deterioration. On the reverse, there is a specific term for the Machine Doubling on EPU, but it presently escapes me. The withered look to the lettering happens when the coin and the die separate. The uneven die cavity scrapes the sides of the lettering. The cavities themselves get smaller and crooked as a result of Die Deterioration damage.

The obverse has what is called Bar Errors. They are apparently fashionable to collect? 1960-D seems to have been the banner year and mint combination for them. I don't believe they are true errors, per se, but rather unique and repeatable patterns of Die Deterioration damage that are somewhere between a die chip and a Cud. You can research which one you have on Variety Vista.

http://www.varietyvista.com/35%20BA...Listings.htm

So I guess the way that bar errors work is that you first find the number of breaks, and then the corresponding code. So yours is going to be ERT0. I can't say definitively if any of the five listings correspond to your coin. Maybe you have something that Dr. Wiles would list on Variety Vista, or maybe I don't know how to read the tea leaves on these coins just yet.

http://www.varietyvista.com/35%20BA...201960-D.htm

this was struck by a very worn out die.