We could not find any stamps but we tested and it is sterling silver. This fine sterling plateau has gorgeous details with hand chase open-work.The total length is:47 1/2" by 22 1/4" in width. The piece is in excellent condition except one of the mirror has some discoloration that is normal due to the age at the end 5mm by 5mm or about:1/4" by 1/4" that can be fixed easily. This silver plateau has been obtained from a very fine Beverly Hills California estate. NAMED ONE OF THE BEST ANTIQUE SHOPS IN LOS ANGELES BY. UPON YOUR REQUEST, WE DO APPRAISALS. FOR A WIDE VARIETY OF FINE ANTIQUES, TAKE A LOOK AT MY OTHER AUCTIONS. The item "PLATEAU 18 C STERLING ENGLISH 3 SECTION LION PAWS GORGEOUS DETAILS-47.5X22" is in sale since Thursday, September 14, 2017. This item is in the category "Antiques\Decorative Arts\Mirrors". The seller is "carolantiq10" and is located in Beverly Hills, California. This item can be shipped worldwide.