Heidestraße 17, Wernberg-Köblitz, Nr. Amberg, Schwandorf, Bavaria
Kunst-Töpferei und Zinngießerei / Art Pottery and pewterer.
Founded by Franz Keck in May 1970. Still trading today.
Reference: Töpferei Keck
Post 1987 pottery stick on label on featured stein. 
Presumably pre 1987 stick on label. 
Earthenware pouring stein, dated 1987 onward. 
Featured stein sold through this vendor. 