Gorham Silver Plated 9 inch Chinese Plate

My mother bought this platter at an estate sale in the early 50's. My mother passed away at 96 in September. am trying to clear her estate. don't know hardly anything about the platter except the man she bought it from told her it would be good investment. That's all my mother could tell me. The platter ...

Heavy plate. Measures 9" across. Has very light surface wear, overall very good condition. Could use little more polishing. The bottom reads: Chinese Plate Yuan Dynasty 1279-1368 A.D. By Gorham For Horizon. Nelson Gallery Atkins Museum, Kansas City, Missouri. ...