My first post! I am unable to locate this mark- a four place mark, 3rd place looks like an ampersand (&) and 4th place looks like an (S). Item has a roll top, heavy quality I assume sp- stands 8" high by 12" long. Here are photos:
Hello Karen. That set of marks was used by William Padley & Son, Sheffield, England (1876-1911). Sometimes you see these marks with their "hand" trademark. They succeeded Padley, Parkin & Staniforth.
For someone just getting into British sterling silver I suggest Charles Jackson's "Silver & Gold Marks of England, Scotland and Ireland". Also recomend the pocket edition of Jacksons.
For silverplate marks like yours I use George Mappin's "EPNS". Also "The Identification and Dating of Sheffield Electroplated Wares 1843-1943" by E.R. Matheau-Raven.