"Churpfalz", spelled "Kurpfalz" in modern German, was one of the names of the County Palatinate, the land and title held by the senior branch of the family. From 1685, this senior branch was Pfalz-Neuburg, and it is under this latter name your coin is found. The one DL20K pictured above (from Krause) is the same type.
As for the date, I would assume it to be 1723; the last digit looks more like a 3 than an 8.
Don't say "infinitely" when you mean "very"; otherwise, you'll have no word left when you want to talk about something really infinite. - C. S. Lewis