Briennerstraße 9, Erzgießereistraße 18, Munich, Bavaria.
Kunst-Töpferei / Art Pottery.
Formed on the 13th April 1898. Closed down in 1991.
The company became a signatory and founder member of the "Deutsche Werkbund" (German Work Federation) on the 5/6th October 1907.
Moved to Bremen in 1910 and then back to Munich in 1939.
Lead by Franz August Otto Krueger & Hermann Obrist, with co-founders and members Richard Riemerschmid Franz Ringer Theodor (Herrmann) Schmuz-Baudiss Peter Behrens Bernhard Pankok and Bruno Paul, for the manufacture and promotion of handcrafted items from their own studio.
Reference: Answers La-Belle-Epoque Wikipedia
1/2 litre Villeroy & Boch - Mettlach #2684, with Vereinigte Werkstätten für Kunst im Handwerk A.G. basemark, dated 1900 and designed by Richard Riemerschmidt. The pottery was presumably made by V&B-M and given to V.W. for glazing. It is reported that this stein is very similar to Reinhold Merkelbach #1729. 
Base of featured stein: 1/2 l.itre, Villeroy & Boch - Mettlach #2684, with no V&B-M logo, but instead with a good base mark of Vereinigte Werkstätten für Kunst im Handwerk A.G., dated 1900. 
Note the similarity of the reversed R's here and on the Vereinigte Werkstätten für Kunst im Handwerk A.G. logo on this Reinhold Merkelbach #2024, designed by Richard Riemerschmidt.. 
1/2 litre Villeroy & Boch - Mettlach #2685, with Vereinigte Werkstätten für Kunst im Handwerk A.G. basemark, dated 1900 and designed by Richard Riemerschmidt. The pottery was presumably made by V&B-M and given to V.W. for glazing. 
Base of featured stein: 1/2 l.itre, Villeroy & Boch - Mettlach #2685, with no V&B-M logo, but instead with poor base mark of Vereinigte Werkstätten für Kunst im Handwerk A.G., dated 1900. 