These warming plates had hot water reservoirs to keep food hot as it traveled from kitchen to a dining room or perhaps a bedroom, and I think they would make a fun collection.
This one has an off-white earthenware body, in the form of a scallop edge plate, with a tubular opening for water, and a place for a stopper or cork (not present) to be attached by a string.
It is enamel decorated with flowers in two shades of bright blue, with bright green leaves and stems, evenly distributed across the face of the plate.
Painted mark 1852 * (probably a decorator's mark. No manufacturer's mark. Staffordshire, circa 1850's.
Condition: Good. Some faint lines and scratches, but nothing really disfiguring.
Size: Approximately 10.125" diameter, 2.125" high.
Note that I try to be conservative about condition descriptions, carefully noting any flaws. Of course, with antique items, there will be some signs of usage, and/or manufacturing defects. But overall, my customers have always been pleasantly surprised upon receiving their items, and of course, I would expect a return if I happen to miss anything.