Okay, if StevenB's and Maineman's voices aren't loud enough, I will help them.
This coin is a very normal 1979D cent. Almost ALL 1979D cents exhibit a split in the lower serif of the mintmark because of a broken mintmark punch. Please do not post that you think it is a repunched mintmark, because it is not. I can point you to a dozen respected noted experts in Lincoln cents who will ALL tell you the same thing StevenB and Maineman have already told you so please - stop arguing with them. They have given the correct answer in this thread and incorrect questioning has been posted over them. This is not the way to help anyone.