Kohlenhofstraße 60, Nuremberg. Bavaria.
Großhändler & Zinngießerei. / Wholesaler & Pewterer.
Felsenstein & Mainzer was founded in 1886 as a small pewtershop. In 1904 they expanded their business to produce their trademark "Norica Zinn" pewterware.
Simon Felsenstein & Sigmund Mainzer purchased steins manufactured to their own designs, mainly from Marzi & Remy, but also from Matthias Girmscheid, which were unique to themselves. These had the pewter lids added and were then often sold wholesale to third parties, such as L.Ostermayr and Kunstgewerbe-Magazin Georg Leykauf
Felsenstein & Mainzer was purchased by Gebrüder Bing on 20th October 1918, who continued to manufacture and sell the Felsenstein & Mainzer's product range after the takeover. The Felsenstein & Mainzer factory, as part of Gebrüder Bing was still manufacturing in Nuremberg well into the 1930's.
Reference: Character Steins Abcap zinnfiguren-bleifiguren
Pages from the Gebrüder Bing catalogue, dated after 1918 showing items from the Felsenstein & Mainzer range. 
Pages from the Gebrüder Bing catalogue, dated after 1918 showing items from the Felsenstein & Mainzer range. 