WW2 RAF Navigators Parallel Rule - Air Ministry 1943

A WW2 RAF Air MInistry parallel ruler. Marked 'Captain Field's Improved with the Air Ministry stamp and dated 1943. As used by RAF navigators and bomber aircrew. Made by Aston & Mander of London, who supplied navigational and other instruments to the British armed forces in both world wars. Made of boxwood with brass fittings, the ruler show signs of use with a small nick to one edge.

Code: 51359