Turn and Bank Indicator Type A-8, Air Corps US Army, WWII, B-17, P-51, P-38 Sperry It has the original crown

It has the original crown symbol of the Air Ministry on the back

An example of aircraft in which this appeared is the Nieuport 28 fighter

The glass and case are intact and the markings are in perfect condition

but that is a guess

Turn and Bank Indicator Type A-8, Air Corps US Army, WWII, B-17, P-51, P-38 Sperry It has the original crownThis pre & early WWII era Turn & Bank Indicator Type A 8, made by Bendix Part No. 1718 2S A2 for the Air Corps US Army, was used across virtually all its aircraft 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 "AC US Army" (Air Corps US Army), and its serial number prefix is AC41, indicating the manufacturing