WWII RAF ‘Secret Intelligence Reports’ – with interpretations of enemy aircraft identification sheets, raid spotters notebook, aircraft identification cards (loose), Aeroplane diary and period postcards presented in an album. Raid spotters notebook is 3rd edition including aircraft silhouettes and information on calculating height and speed of planes, dealing with air raids, incendiary bombs, first aid gas attacks, 68 pages with an additional note book section at the back, worth inspecting