Aircraft Recognition Manual, USAF 1955 AF Manual 355-10 Vulcan Here is a WWII-era Aircraft

Here is a WWII-era Aircraft Spotters Handbook published in 1943 by the National Aeronautics Council for use by civilian air observers

This example has "US AIR FORCE" embossed on its face above center

All pages appear to be present

The nature of the modification is unknown

and illustrates formation flying and engaging enemy aircraft

Aircraft Recognition Manual, USAF 1955 AF Manual 355-10 Vulcan Here is a WWII-era AircraftThis 176 page Aircraft Recognition Manual for the Observer was provided to personnel of the Ground Observer Corps, an organization under joint operation of the US Air Force and civil authorities. Observers worked within the structure of the Ground Observer Corps to ensure proper training and communication. Observers, who were US Citizens and volunteers, would train to become "Qualified Observers". Observers were responsible for spotting aircraft of US