KPM refers to Berlin porcelain, but the same initials were used alone and in combination with other symbols by several German porcelain makers. They include the Konigliche Porzellan Manufaktur of Berlin, initials used in mark, 1823-1847; Meissen, 1723-1724 only; Krister Porzellan Manufaktur in Waldenburg, after 1831; Kranichfelder Porzellan Manufaktur in Kranichfeld, after 1903; and the Krister Porzellan Manufaktur in Scheibe, after 1838. Rosenthal acquired Krister in 1921 and in 2004 erased trademark certification for all Krister marks. For more information, explore our identification guides for KPM, Meissen, lithophanes, and other German porcelain.