Germany › German states › Trier, Archbishopric of
J P C = Johann Philipp von Walderdorff
Maybe yours is KM# 270
as KM# 271 is 2 Pfennig and KM# 272 is 4 Pfennig.
KM# 270 is also Schön DM# 67 and Schön shows a picture which matches your coin. The monogram is again slightly different but the picture is 1762 and the 1757 coins in all denominations seem to have a slightly different monogram than the 1762 coins.
(There are even monogram differences inside years in some cases. I have two 1758 Trier 2 Pfennig coins with slightly different monograms.)
Interesting that it is so hard to find images of a 1 pfennig (I found one example of the 1762 on MA-shops and one on eBay). It must be a somewhat scarce type compared to others.