Abstract: A device for displaying indicia is constructed to fit onto a mirror housing of an exterior mirror of a motor vehicle. The device, upon installation, displays a desired indicia facing the front of the vehicle without obstructing the view of the mirrored surface facing the rear of the vehicle. Variations in structure are provided. Preferred embodiments provide for removal of the device without harm to the mirror housing, and also provide for ready change-out of indicia. The invention also relates to kits and methods employing embodiments of the device.