Ernst Dorfner & Cie. (& Co.)
Hirschau bei Amberg, Bavaria.
Porzellan- und Steingutfabrik, sowie Kaolinschlämmerei / Manufacturers of porcelain & earthenware and kaolin treatment.
Founded by Ernst Dorfner, who split away from his relations in the original
Dorfner & Co
to form his own company, which c
ommenced manufacturing in 1894. Ironically he sold out to the sons of his relations at
Gebrüder Dorfner
in 1913.
Reference:
Kaolin Mines
Photograph of Hirschau factory, circa 1900 Porzellan- und Steingutfabrik von Ernst Dorfner et Cie. 
Impressed E.D.& C. for Ernst Dorfner et Cie. 
Highly stylised ink stamp "E.D.& C." together with a circular "Made in Germany", which often appears just by itself, or in conjuction with an impressed E.D.& C. or a vendor's mark. 
1/2 litre porcelain stein with hand painting over transfer. 
Impressed E.D.& C. similar to that on the above stein. 
Details of thumb pull and rear of lid together with the 1/2 litre capacity mark. 
Impressed Hirschau E.D. & C. mark for Ernst Dorfner et Cie. N.B. The E of "E.D.&C." has been added later to an existing Dorfner & Co stamp. 