A set of three early 19th century old Sheffield plated wine coasters

A set of three early 19th century old Sheffield plated wine coasters,

unmarked circa 1810-20,

fluted circular form, gadroon borders, wooden bases set with a central button engraved with a crest, diameter 15cm, plus a single old Sheffield plated wine coaster, of circular form, gadroon border, the wooden base set with a crested button. (4)

The crest is that of Halford.