Glas- u. Porzellanmanufaktur Karlheinz Zimmermann
Glas- und Porzellanmalerei / Glass & porcelain decorators
Schloßstraße 5, Sandizell, Schrobenhausen, Bavaria.
Known dates: Circa 1970 to date.
Reference: www.bierkrug-zimmermann.de
Ink stamp,"Z" for Zimmermann of Schrobenhausen, on featured miniature stein. 
Miniature porcelain stein 
Lid made by Erbo Zinn 