Makers mark identification assistance requested. Piece tests for sterling silver with testing acid. Mark sequence under top rim has 5 marks: G.I C (I could be an & symbol, unclear) enclosed in an outline with a point at top and bottom, a crown enclosed in a circle (looks like a Sheffield mark), an unclear mark, a sunburst enclosed in a circle, and a tulip on its side enclosed in a circle. Handle of piece lid attaches with a wing nut. Piece dimensions are 9 inches by 6 inches by 4 inches