When I expand the picture, the stamping looks irregular - some sides of the star are thicker than other sides. I would expect uniformity.
Please post pictures of the movement.
I suppose a remote possibility is the clock is a Junghans clock but manufactured outside Germany.
Just recently, a Junghans wall clock that was manufactured in Italy was presented on this forum. This was the first non-swinger, Italian made Junghans that I ever saw. That movement showed a date stamp (which Junghans is known for) that did not fit the dating protocol for Junghans in the particular year of manufacture. But, I had no reason to doubt its authenticity and I assumed that the Italian manufacturing plant used different identification protocols than the German manufactured products.
However, as I stated above, a picture of the movement could be very helpful.