Sheffield plate salver

As far as my research can tell, this item would be from the “Regency” period of Sheffield plate roughly 1800-1820, based on the rectangular inserts for engraving and gadrroon edging. It is an oval salver around 18 x 14 inches and weighing around 1.2kg or 3lb5oz. In reasonably good condition with just a little copper showing through the silver on the edges and the inner rim. I am still looking for clues about the maker via a post in the “what is it?” forum . . .