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Medium oval tray (12.5" X 16.5") with the following stamped on bottom: "GMCo" "E [Gorham Anchor] P" "07670" "16TF" and on the other end of the tray, a small horseshoe stamp. The tray is obviously silver plate--I'm curious about the base metal (because it's really quite heavy) and I'm curious about a...

Who made it and when? Padlock-shaped mark with "EPBM" on teapot only. All three pieces have "C1646" hand-scrawled--too early to be circa date for EPBM, perhaps a catalog number? Thanks ever so much for any and all assistance! [The photo of the mark is a little fuzzy, I know!--but the the mark in que...