This is a GENUINE WW2 standardization handbook for B17 Flying Fortress pilots.
"On The Square" Handbook For Freemasons, Wm. Hy. Beable, 1923 Signed 1st Ed
Rolls Royce handbook for Merlin aero engine
WW2 AA DEFENCE HANDBOOK for the "SOUND LOCATOR, MARK IX" (Searchlight Equipment)
WW2 ANTI-AIRCRAFT SEARCHLIGHT HANDBOOK for the "PROJECTOR, A.A., 90-CM, Mk. V"
WW2 AA SEARCHLIGHT HANDBOOK for the "PROJECTOR, A.A., 90-CM, Mk. V1 or Mark VI*"
WW2 AA DEFENCE HANDBOOK for the "SOUND LOCATOR, MARK VIII" Searchlight Equipment