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Royal Air Force 'AM' Marked Navigator's Parallel Rule
£50.00
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Description
Smaller size AM 13/44 marked 'Capt. Field's Improved' boxwood parallel rule with brass fittings. Approx 12 1/8' long by 2 5/8' wide when closed. Some tarnishing of metal parts. Good used condition overall. Used by the Navigator for route plotting in bomber aircraft.