Gunners Information File USAF Manual No 20, for B-29 Superfortress F-4 Phantom and updated in 1941

and updated in 1941

The face is embossed BU AERO US NAVY (i

Wheel & Flap Position Indicator

with an interesting history

The indicator for engines #3-4 has the Munsell green markings on its scale typical of US Navy aircraft

Gunners Information File USAF Manual No 20, for B-29 Superfortress F-4 Phantom and updated in 1941This 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