WW2 London Addison-Luard Navigation Device, Course & Wind Calculator Type D

WW2 London Addison-Luard Navigation Device, Course & Wind Calculator is in good condition.
The Circular, metal device is used for the calculation of course and wind in aircraft. Device has numerous numbered markings and moving parts involved in its use & made and used by the British, before and during WW2.

Box for storing the device measures:
31.5cm Wide
31.5cm Long
10cm High
Total weight - 2.8kg

_gsrx_vers_1730 (GS 9.9.4 (1730))