Turn and Bank Indicator Type A-11 Air Force US Army, WWII, B-17, P-51, P-38 Czech the numerical scale rotates clockwise

the numerical scale rotates clockwise or counter-clockwise while the pointer remains stationary

The turrets impose less drag on the airplane

or whether the gunner is strafing a stationary target

This is a 1950's-era Attitude Gyro Horizon Indicator as used in the US Navy/Marine Corps Fighter Jet Grumman F9F-5 Cougar and the HUP-1

For the world

Turn and Bank Indicator Type A-11 Air Force US Army, WWII, B-17, P-51, P-38 Czech the numerical scale rotates clockwiseThis Turn & Bank Indicator Army Type A 11, made by Bendix Part No. 1721 2U A2, was used across virtually all aircraft of the US Army Air Force during WWII, including bombers B 17, B 24, B 25, B 26, fighters, P 38, P 39, P 40, P 47, P 51, and transports C 46 and C 47. Imprinted on the face, but barely discernible in the photos, is "AF US Army", and its serial number prefix is AC 42, indicates the manufacturing year 1942. This unit has the filter for