Gyro Horizon Indicator, AN-5736-1, Sperry 656768 B-24 such as the P-38 Lightning

such as the P-38 Lightning

The handle

and is marked "AC USARMY" on its face

WW2 vintage aircraft clock with center knob

as confirmed in its parts list dated 1957

Gyro Horizon Indicator, AN-5736-1, Sperry 656768 B-24 such as the P-38 LightningHere is WWII era vacuum driven Gyro Horizon Indicator Type AN 5736 1. According to the Maintenance Interchangeability Cross Reference Charts of the Air Forces US Army dated Dec 1943, this Gyro Horizon was ubiquitous in its use, appearing in bombers B 17, B 24, B 25 and others, as well as fighters P 38, P 40, P 47, and P 51. The knobs function. The center knob adjusts the indexing indicator for the view angle of the pilot. The caging knob pulls out and