Here's some information on dating Walker & Hall silverplate marks.
Sources are George Mappin's "EPNS" and E.R. Matheau-Raven's "Sheffield Electroplated Wares 1843-1943".

1878 c. ...

1893 c. ...


"SHEFFIELD", 1861 - 1890.


"SHEFFIELD ENGLAND", 1891 - 1909.

" SHEFFIELD MADE IN ENGLAND", 1910 - c.1970.

1920 - 1940.
Pat.
.