I found this 1984 P nickel. The back looks like doubling. The front also has doubling and it looks different around the lettering not sure what that would be called.
sorry but I cannot see any doubling.... I do see light reflecting off the bottom edge of the lettering, which can make a coin appear to have doubling when it does not. Maybe you need to work on the lighting? Anyway I see nothing out of the ordinary here
See "Die Fatigue" and "Die Polishing" in this link http://hermes.csd.net/~coneca/content/StrikeDoublingFlyer-PDF.pdf