This stein lid shows the "Studentengesangverein Zürich" (StGV) which was proposed in 1839 by one Wilhelm Baumgartner, but was not officially established until 22/01/1849. The name was changed in 1949 to "Zürcher Singstudenten". Its motto is "Mein Lebenslauf ist Lieb und Lust und lauter Liederklang" or "My life is love and pleasure and the lusty singing of songs". The colours are Blue-White-Blue. The Wappen shown above is now different, with the background colour of the shield's top right quadrant, now being blue. The "Zürcher Singstudenten" still exist today, at Spiegelgasse 33, Zürich, which includes a restaurant called the "Kantorei".
Reference: Singstudenten Zürich
Personalised envelope dated 23/9/1919
Addressed to: Herrn Gustav Krech
Farben f(ür) Porzellan
Oeslau b(ei) Coburg