Help With Identification Of Silver Tray

Hi Guys Newbee Here I Have Been Having Trouble Trying To Identify A Hallmark On A Bead Trim Silver Tray I was Wondering If It Was An Imported Piece From America And Assay Thomas Warner Baltimore? Any Help Would Be Most Appreciated [/img]

This is an electroplate mark of Thomas White of Sheffield. So not silver unfortunately.

Thanks For Your Help Most appreciated