Lit-ning vintage industrial steel desk top in & out paper tray w/ office file organizer

Heavy steel office organizer with a great machine age look! We didn't see a makers mark on this one, though it looks like a Lit-ning piece to us. 

There's four paper tray slots and three upright slots for standing files etc.. The whole thing measures 15 1/2" x 11 1/2" x 8 1/2" tall, and is in good clean condition overall.