antique chandelier lamp parts, ornate embossed brass bobeches for lights

Set of four antique embossed brass hanging lamp socket covers, 3 3/4" in diameter overall. These are 2" in diameter at the fitters, and 1 3/8" diameter at the openings. All four look good, no splitting or cracks - though these are very tarnished and dirty. We haven't found a makers name of any of these, sorry!