I recently recieved a box of "antique" silver(most likely silver PLATED). But a couple items peaked my interest. One is a Reed & Barton EPNS 4050 stemmed cup. It has a mark on it somewhat like a globe with a sort of wings on top and I cant find this date mark anywhere to establish production date. I also came across a WM A ROGERS tray but its only identifiable marking is an adhesive sticker stating "WM A ROGERS SILVERSMITH" on the bottom. Can anyone suggest a way to find more information on these items including value?