Wilhelm Rittirsch Porcelain Factory - Dresden Art
Küps, Bavaria.
Hersteller / Manufacturer
Known dates: 1950 - 2003
Reference: Porcelain Marks & More
Basemark on featured stein, which also says Handmade. 
The initials of Wilhelm Rittirsch plus "Dresden Art" and "Made in Germany" 
"Indian Chief" #677
This is the mould number allotted to the "Indian Chief". 
The basic Dresden Art mark with the initials of Wilhelm Rittirsch 
Above, plus "Made in Germany". 