yes, the Göricke is quite close, too. But like the Hercules, it doesn't cut it completely.
But you may want to look up the makes in the following list that all used the little Sachs engines in the early fifties.
There are a few Dutch and Belgian ones like Sparta, Batavus, Superia, Socovel, Sarolea and Royal Nord but most are German, of course:
Anker, Bismarck, Bücker, Dürkopp, Express, Gritzner, Hecker, Heidemann, Hoffmannn, Mammut, Mars, Meister, Miele, Panther, Patria, Phänomen, Rabeneick, Rixe, Torpedo, U.T. and Wittler.
That will keep you occupied for a while!
Cheers
Andy