Would anyone be able to confirm that this cup is silver plated?
Thanks,
DougL
Most likely plated as the mark is square.
Orfèvrerie ERCUIS, Paris, France.
Founded in 1867 by Adrien Céleste Pillon (Ercuis is the name of a little village of the Oise). After his bankruptcy (1870) the venture was revived by George Maës, glass cutter in Clichy. The company turns to arts of the table; coffee and tea sets silver plated metal or, silver cutlery massive. He opens stores in Paris, in province and abroad. The mark “Ercuis” and its punch “the Centaur” are universally known. The factory is still active in present days.