This ornate circular black cast iron trivet is American made and stamped #28.  The circle has a defined center petal flower and strong sawtooth detailing on the circumference.   It is heavy and smooth without pitting on the surfaces.  It has three raised feet and stands level on the table surface. It has a natural rusty patina consistent with its age and use.  Use to protect your tabletops or hang as a decorative piece of Americana.   Measures 8.5" long X 5.5" diam X .75" tall