round antique architectural heating register grate or grill, arts & crafts mission vintage

Old antique cast iron architectural heating and ventilation grate, for your restoration project. This grate is round and measures 11 1/2" across. It is about 9 5/8" across the inner honeycomb grill (with an almost 1" lip around the edge). It measures about 3/8" thick. This register grill has flaking old paint.