I have never seen such an elaborate amount of work in order to accomplish this effect of a matchbox shrinking in size to the tiny one pictured.  This was made in such a way that with the passing over of the hand the magic would happen and the box can be shown on both sides!  This includes instructions and a copy of the original Ad.  Condition even though the unit shows splotches it is still a marvel to look over and understand how someone could have figured this all out.  Scarce.