Vintage Mid Century, heavy solid brass drawer knobs or cabinet knobs, round mushroom style, circular design on fronts,  1.5" diameter, each knob weighs 3 oz each, center core may be another type of metal-- see photo.  These knobs had been drawer knobs to two vintage metal chest of drawers possibly from 1940s-1960s, I had purchased vintage metal chests of drawers in 1990s. When I moved in  2000, I could not take chests but took brass knobs.  These have been cleaned with only  vinegar and steel wool, but they could look almost new with a little brass polish if you prefer. Vintage, preowned, possibly few scuffs from normal wear, no screws, selling as set of 20 knobs. Last two photos taken with outdoor light, one knob polished with brass polish.  Color is golden.