Ernst Hess
Eugen Schuster
FX Huller
FX Huller
Or, if you prefer, Franz Xaver Hüller or FX Hüller.
Helen's page on FX Huller is at http://bassic-sax.info/version5/vintage-saxes/european-made-saxes/f-x-huller/
Also, definitely check out the beautiful http://fxhuller.com website.

FX Hüller also made some stencils for Hammerschmidt" and CA Wunderlich. Be sure to check out those pages for some more pics.
Franz Kohler - MIGMA
Franz Kohler - MIGMA
Franz Köhler
Franz Michl
G Rudolf Uebel