1Corbin Artistic Doorknob Corbin-489December 6, 2023/in Corbin Hardware, Exterior Entry Bronze Doorknobs/by adminRare Corbin cast bronze entry doorknob with an Anthemion design circa 1905 shown in the Corbin Artistic Catalog ADCA designation F-21400 . Doorknob in nice condition and takes a 3/8″ spindle.