Hugo Schmidt
producer/manufacturer
(Hugo) Schmidt
103 Bogenstraße, Koblenz, Rhineland Palatinate.
Known dates: Schmidt marking's have been seen as early as 1957.
Sometime between 1966 and 1972 the mark changed to Hugo Schmidt, which continued on to 1991.
Steins purchased from:
Reference:

"Cold War" Porcelain stein, dated 1957.

Basemark on stein left.

Basemark on stein right.

"Cold War" Porcelain stein .