Original British WWII RAF Bomber Bubble Sextant Mark IX in Bakelite Wall-mounted Case - dated 1940 VHS The reverse of the award

The reverse of the award is plain

and was based on the earlier SA Quartermaster's Department

Relative humidity can also be determined by locating the intersection of the wet and dry-bulb temperatures on a psychrometric chart

Features the classic string closure to the back and a yellow felt five-pointed imperial Japanese star cap badge

This examples in fine condition with some original finish and crisp markings

Original British WWII RAF Bomber Bubble Sextant Mark IX in Bakelite Wall-mounted Case - dated 1940 VHS The reverse of the awardOriginal Item: Only One Available. This is a very nice British Air Ministry marked Royal Air Force Bubble Sextant Mark IX, in very good condition. These were used for night time navigation about WWII Aircraft, such as the Avro Lancaster Bomber, and others. It comes complete with its wall mounted Bakelite Case Transit chest, which would be carried on board the plane, and then mounted to the wall by the Navigator station. The left side of the sextant is