This is an original 1965-68 Chevy Impala NOS Left Vent Window Regulator.  Nice condition, never been installed-see photos.  GM Books show this fits '65 Chevy full size passenger cars (except sport models); '66-68 Chevy full size 4-door sedan (except sport sedan); '65-67 Oldsmobile Jetstar, Dynamic 88, Delta 88 all Celebrity Sedan; and Delmont Town Sedan (all 4-door).  Fits Left Front Door.  Please check my other auctions.