This is a silver plated plated plate clip made by Walker & Hall in 1910. It is larger than the usual fish bone clip. It is actually pictured on a side plate, so it it not as large as it might seem, but it is still the biggest one I have seen. Would anyone have any ideas for it purpose. Dipping sauce is top of the list at the moment, but I am not sure about Edwardian Dim Sung.