Identified by Philippe Lanez, "German salt seal from Lünebourg,
o/ SALZ SOCIETE LÜNEBOURG
r/ LÜNEBERGE(R) // SALZ // 2 PESO NETTO // SALIN
see Ajo guest answer at Sucherforum
I forgot this "PESO NETTO" = net weight"
See BSG.BS.00824 for a Royal Saltworks Lüneburg Seal and links to others.