Hi,
Right, it is Hanau,
Neresheimer & Sohne.
See here:
https://www.925-1000.com/Fgerman_hanau_marks_01.html
There are three Hanau marks in your salt;your mark on the left is
s520,the mark on the right N is pseudo mark often used to imitate Nuremberg.Hanau silversmiths used various combinations of pseudo and phantasy marks,perfect match of full set of marks is sometimes seen, but most of the time one matching mark is enough for positive identification.
Regerads