US Army Air Force
Flux Gate Compass System Handbook of Operation and Service Instructions AN 05-15-16
This is an original set of Handbook of Operation and Service Instructions AN 05-15-16 May 1944 and Revisions August 1944 for the Gyro Stabilized Flux Gate Compass System. This system appeared on most WWII bomber aircraft such as the B-17, B-24, and B-29, as well as some transport aircraft.
The May 1944 Handbook is 75 pages, while the August 1944 Revision replaces about 35 of those pages.
Both documents are original unbound loose leaf binder pages, stapled together.