RAF Bombsight Mk XIV Emergency Computor Ref 9/2648 F7U Cutlass It has as service label

It has as service label dated 1953

25 inches wide by 5

The card is marked with the four cardinal points

evidence of a manufacturing year of 1942

RAF Bombsight Mk XIV Emergency Computor Ref 9/2648 F7U Cutlass It has as service labelThis is an authentic original WWII era Emergency Computor (sic) designed for use with the Mark XIV Bombsight in the British RAF's Avro Lancaster Bomber. It appears to be a manual back up device for use in an emergency, possibly if the mechanical computer within the bombsight malfunctioned. One side shows speed as measured in knots, while the computer on the other side shows speed as measure in MPH. This plastic or bakelite device has a circular slide