Abstract: A protective armor device adapted for use with machines having openings, particularly slot openings such as bill changers and the like. An armored frame is provided that can be secured to a machine with an opening such as a slot overlying the slot opening in the machine. The armored frame has a rigid bar adjacent to and overlying the slot opening. It also has a protective shield spaced outwardly from the opening and the bar, having a top edge at a level above the bar. The spacing of the bar and the top edge and the height of the top edge is set so that it is impossible to insert a crowbar or the like into the opening in the face plate and in the machine.