RAF Navigators Parallel Ruler -Air Ministry

A WWII RAF Air MInistry Parallel Ruler. Marked 'Captain Field's Improved.
Made by Astor & Mander & Co of London with the Air Ministry Stamp and Dated 1942
Used by RAF Navigators and Bomber Aircrew Made of Boxwood with Brass Fittings.
18 inches - 46cm in Length
In Used Condition as Per Photo's

Code: 53192