Please help. I am looking for the potter of this sheep or ram, NK mark

Hello, to all of you. This is the first piece i am posting here, from some of those i vainly looked for on many databases .
I bought this sheep from a junk yard , whose owner uses to get all the stuff from West European countries, especially Germany. I did find some interesting pieces of pottery; only on a few of them i managed to put labels of provenance.
I do hope your wisdom will help me to label most of the other ones.
I respectfully thank everybody, no matter would it be any clue.