two matching c. 1907-15 antique american interior ceiling flush mount white opalescent pressed glass shades salvaged from a chicago athletic club assocation building utility closet. the deep bowl and/or bell-shaped reflectors feature a repeating grooved or ribbed pattern. standard fitter opening. free from breaks or cracks. likely fabricated by or for the r. williamson co., chicago, il. limited quantity of this type of shade from this salvage. priced for the pair. each one measures approximately 4 inches tall with a 5 inch diameter.