a holding device attaches to the license plate screw bosses of a vehicle in the usual way and has a first receptacle with a first pair of slots for receiving a temporary driving tag and a second pair of slots , behind the first pair , for receiving an advertisement plate of the dealer . a second receptacle has an actuator that dispenses an information disc through a slot upon the depression of a switch . a delay circuit may provide a time delay between disc dispensing cycles . a lamp is controlled by a depression switch located within the first pair of slots so that a plate acts on the switch in order to illuminate the lamp for night test driving , which illumination may be overridden by a photoelectric cell for daytime use . posts extend rearwardly of the second receptacle and have ears with openings through which screws pass and the screws received within the bosses . a stabilizer bar also extends rearwardly of the second receptacle .