British WW2 AM Cased Map Plotting Tool Alidade R.E-Co MK2

In a very stunning condition a complete and hard to find WW2 British Army Royal Air Force (RAF) Air Ministry Map Plotting Tool Alidade R.E-Co MK2.
The potting tool comes with the original wooden cover.

An Alidade is a device that allows one to sight a distant object and use the line of sight to perform a task. This task can be, for example, to triangulate a scale map on site using a plane table drawing of intersecting lines in the direction of the object from two or more points or to measure the angle and horizontal distance to the object from some reference point's polar measurement. Angles measured can be horizontal, vertical or in any chosen plane.

A very stunning example!

Code: 76650