This is a vintage, unused/unfinished production casting of the Mk VII Science Tricorder used during the series. The Mk VII Tricorder also saw limited use in DS9, VOY and the first TNG film. Body made of vacuum-formed styrene with vacuum-formed door, just like the screen-used originals. This one, in fact, is an extra pull the Prop Dept. simply never finished for screen use, so is the next best thing. Requires basic hardware (hinges), screen-accurate graphics and accurate automotive paints to finish.