A Rare Vintage US Military WWII Era BK Elliot Co. Plotting Machine in good condition. A authentic WWII-era navigational plotter used by aircraft navigators to plan, plot, and track their course along a chart. This plotter would have been affixed to a navigator's map table and laid upon the map of the flight plan, typically in a large aircraft. This kit includes the plotter, a straight edge, a mounting clamp, a diagram and wooden case. This plotter is in used condition (Please See Photos for Condition). In spite of being almost 80yr old everything seems to function properly.