1st item: Old Sheffield silver plated warming tray in a trefoil shape with conforming hot water base and two foliate scroll handles, atop three wooden compressed ball feet, double sunburst mark on base attributed to Matthew Boulton. 3-1/2"H x 12"W x 9-1/4" D. 2nd item: Wine coaster with gadrooned rim and wooden base, double sunburst mark on side with a center unidentified mark, attributed to Matthew Boulton. Both pieces English, early 19th century. Condition: Both pieces in very good condition with minimal edge wear and a few scattered small dents and scratches.