Hi Corrado,
The JPC is from a monogram on a Cabinet
https://www.rijksmuseum.nl/en/collection/BK-16676
It was made by Abraham Roetgen, the best furniture maker in Johann Philip his time.
Other texts concerning Johann Philipp are: "Johann Philipp von Walderdorff was more secular than his predecessors. He was a passionate hunter, loved the luxury, and presented it at his court. "