O.K. Nickball, your forced me to look more closely and after some search in the Schenzle publication I finally found it. Thank you for that!
See below. The somewhat strange "h" fooled me, but that is the editor's marking. The engraver, Peter Sturm's marking, was also a bit tricky to recognize. Which of the two artists Timper and Heinrichs is the remaining question.
So here we are.