This is an assembled "UJ Master Midget" flying rocket model made by an unknown manufacturer. It has a pasteboard body and balsa nose cone and fins. The model appears to have flown at some point and the motor removed.
G. Harry Stine, a pioneer in the field of flying rocket models, donated this artifact to the musem in 1973.
This object is not on display at the National Air and Space Museum. It is either on loan or in storage.