Gunners Information File USAF Manual No 20, for B-29 Superfortress F-4 Phantom but all of the pages

but all of the pages appear in place and intact

Wheel & Flap Position Indicator

The remote indicating magnetic compass system can operate on any combination of frequency and voltage where the frequency is 13 to 17 times the voltage

The tripmeter reset knob is bent just a bit

This is a fine example of a BC-434-A Remote Control Box for the aircraft receiver BC-433 of the Radio Compass SCR-269 system for direction finding and homing

Gunners Information File USAF Manual No 20, for B-29 Superfortress F-4 Phantom but all of the pagesThis post WWII era bound edition of the US Army Air Force's Gunners Information File consists of several separate WWII era manual publications combined into one hardback volume. The first section of ~100 pages describes the operation and maintenance of the . 50 Caliber Browning M2 Aircraft Machine Gun. The 80+ page second section describes sighting and sights. The 30 page third section deals with aircraft recognition. The fourth section discusses