1940-1945 39-45 40-45 aeroplane aeroplanes air aircraft aircrafts airplane airplanes armies army aviation booklet booklets british calculate calculating close close-up close-ups closeup closeups computer corrections device devices europe european fighter flies fly flying force height heritage historic historical ii insect instrument instruments lemania manual military navigation navigational nero patrimony plane planes pocket-watch raf royal second spitfire stopwatch two up ups war world ww2 wwii