1930s OLD BALLOON RANGE FINDER DAVID WHITE CO MILWAUKEE WIS, 9919. This is an Original D. CO, Milwaukee, David White Co, Milwaukee Wis, Theodolite-Shore, This is an Old Instrument evidently used to determine Range and Elevation of Weather Balloons by the United States Navy. Nice obsolete Aero Space Instrument. Comes with original box and accessories! If you have any questions be sure to let me know!