W05220 Blade 17-3/4″ x 2-1/4″, 3/8″ centerhole

W05220 Blade 17-3/4" x 2-1/4", 3/8" centerhole. The blade is marked with W05220.  There are three holes blade.  This has been sitting in inventory.  Not sure of the manufacturer, but the blade has slight rust/discoloration, scratches and paint chips from sitting in inventory.  Blade is still solid.