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Question about a silver/glass serving bowl

I am trying to identify the maker of this serving dish. and establish if it is silver or plate. I have enclosed photos of the piece showing the only marks we can find. I do not see any of what I would consider “silver” hallmarks. Any information you could provide will be greatly appreciated.

The absence of any “silver” marks implies that it is most likely plate. There is an outside chance that it might be Old Sheffield Plate (OSP) rather than electroplate. OSP comprises a “sandwich” of copper in silver fused together by heat and pressure. It can often be detected at an edge where the separate layers may sometimes be seen. I am suggesting the possibility of OSP because of the resemblance of the outline star mark to that of Dixon & Co of Birmingham.

Phil

Hi Phil,
Thank you for the information, it is very helpful.
All the best,
Charles