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Air Ministry parallel rule, 1940


Code: M22891

By A.G. Thornton Ltd.  1940 dated.  'Capt. Field's Improved' boxwood parallel rule with brass fittings.  Approximately 45cm/18" in length x 7.5cm/3" wide when closed.  Clear Air Ministry and crown markings.   Light scratches and a few minor 'bumps' around the edges but in good '+' used condition overall.  As used by the Navigator for route plotting in bomber aircraft.  Stock code M22891.