VINTAGE CAST IRON CANOPY FOR CEILING FIXTURE B.B CO.

Canopy measures 5" across the top and is 3 1/2" tall not including the stem. The stem is marked B.B.CO. 6157 PAT. APPL'D FOR. Stem measures about 6" long. The stem does have a couple of dings, w someone may have tightened the set screw to tight.