This is a vintage piece that I think is a butter dish and lid, but it could be a toy sized serving dish for dolls. I believe it is Chrome plates, marked Sheffield USA (probably plated stainless). The knob is black plastic or perhaps even Bakelite. Has some light wear and a bit of spotting, small ones. If it originally has a small glass insert, I do not have it. The tray is 6.75" x 4.5" and the lid 5" x 3.5" across. If I can get this packed for 13 oz or less I will ship via 1st class and refund any savings.