Aircraft Recognition Manual, USAF 1955 AF Manual 355-10 Vulcan It has a service label

It has a service label marked NAS JAX (Naval Air Station Jacksonville FL) dated 1952

The Standard Beam Approach System is similar to the ILS system used in Modern aircraft

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

for basic instrument flight procedures and IFR

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

Aircraft Recognition Manual, USAF 1955 AF Manual 355-10 Vulcan It has a service labelThis 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