Air Ministry parallel rule, 1940

Air Ministry parallel rule, 1940

Code: M22351


W: 7.5cm (3")L: 45.5cm (17.9")


By Harpur & Tunstall Ltd.  1940 dated.  'Capt. Field's Improved' boxwood parallel rule with brass fittings.  Approximately 45.5cm in length x 7.5cm wide when closed.  Clear Air Ministry and crown markings.   A bit soiled with light scratches and a few 'bumps' around the edges but in good used condition overall.  As used by the Navigator for route plotting in bomber aircraft.  Stock code M22351.