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Vintage "Douglas" combined protractor & parallel rule. Navigation aid for air pilots and sailors. In a sturdy cardboard case and including two typed pages of instructions. Very Good Plus condition. The protractor incorporates the logo of the Association of British Aero Clubs. See photographs. "Designed by the late Rear-Admiral Sir H.P. Douglas R.N., Hydrographic Department, Admiralty, London". The Douglas Combined Protractor and Parallel Rule is a vintage navigation item that combines the functions of a protractor and a parallel rule. This product, being a vintage original, holds historical significance in the realms of air and maritime navigation. It is a valuable collectible for those interested in the history of navigational equipment. Its durable construction and unique combination of features make it a highly sought-after piece for antique collectors and enthusiasts of maritime and aero artifacts.
10.99 GBP
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