gerz beer stein

Simon Peter Gerz I was born on 13th September 1830.
He founded his company in 1857, possibly on an existing family pottery business that dated back as far as 1810. His company finally received its licence to produce in 1862.
(There was another Simon Peter Gerz (b.1833, d.1908, in Höhr, who used the suffix "II" to differentiate himself from S.P.G. I. He was father of Alois Jacob Gerz of Roßkopf und Gerz).
Simon Peter Gerz I, died 12th September 1893 and was succeeded by his son-in-law Alphons Wilhelm Lötschert (b.17th April 1863 - d.24th November 1945). The company became a G.m.b.H. on the 5th August 1897. The company's products were distributed as well, through Steinzeugwerke Höhr Grenzhausen Gmbh marketing organisation between 1912-1918. The original company continued until 1997.
There is a new company, of the same name, but owned by Domex, currently in Hillscheid, Rhineland Palatinate.
 

Bottom mark on your stein looks modern,1949 -1990,there are lots of these steins all over the internet and value is not very high - they are usually sold from 10$ to 50$ max - older types can reach higher prices...

http://www.steinmarks.co.uk/pages/pv.asp?p=stein88