We have a brass ornate round salvage piece. It is vintage, unsure of the exact date or use of this piece. It could have been salvage from a lamp? It measures about 1 7/8" across the center x about 3/16" in D. The center hollow measures about 3/8" across the opening. It has tarnish and staining on it - I did not attempt to clean it other than with a damp rag.