KPM Porcelain Plaque Depicting Queen Louise of Prussia, Signed Germany, late 19th century, signed to recto lower right "R Dittrich.," depicting a full-length portrait of Queen Louise of Prussia (1776-1810) descending staircase, after Gustav Richter (German, 1823-1884), inscribed to verso "Louise / nach G. Richter," with impressed factory mark "[scepter] /KPM /407 / 363." Plaque 16 x 10 5/8 in.; Frame dimensions 20 1/4 x 15 1/2 in. 品相报告: Good estate condition; frame with later gilt.