Aeronautical Instruments & Tools
Stock No. 4773
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RAF Air Ministry Marked Navigator's Parallel Rule - Click for the bigger picture

RAF Air Ministry Marked Navigator's Parallel Rule

These were issued to RAF navigators in the early part of WWII, prior to the introduction of the Douglas Combined Protractor. This example is AM marked and dated 1942 as well as Captain Fields Improved Apparatus. It is in good issued condition but with a small chip to the top left section of the rule as is often the case with a working instrument of this type. Measures 18" (45cm)