Welcome satnat ,I believe this is your china
http://www.replacements.com/webquote/ALTDIA.htmThis will give you an idea of replacement value or if you wanted to add to your set.
1838 Nowotný received a license to produce household, decorative, and table porcelain. He gave attention not only to quality, but to design, developing new designs with Praha painter Jiri Dobler and sulptor Thomas Seidan. Additionally, he had retail stores in Praha, Budapest, and Vienna.
1884 Moritz Zdekauer purchased the factory. The letters "MZ" have been maintained in the logo ever since, including being on the factory building.
1909 C.M. Hutschenreuter, the Hohenberg, Germany porcelain manufacturer, became the owner, and named it Altrohlau Porcelain Factories (Altrohlauer Porzellanfabriken). The bank retained a part of the factory. One of the marks appears as CM-R, but is actually, CMHR.
1921 it became a joint stock company.
One can find numerous decorator marks and importer marks with one of these factory marks.
1945 it was nationalized as Starorolský Porcelán, then in
1958 it became Karlovarský Porcelán Stará Role I.
1992 the company was privatized and was known as Starorolský Porcelán Moritz Zdekauer.