Turn and Bank Indicator, 4 Minute Turn, & Eyebrow Lamp Italian the dial on the right

the dial on the right is nearly identical to that unit

The compass was illuminated electrically via bulb mounted in a small compartment over the compass itself

2-inch thick book includes 25 lessons covering all aspects of aviation instruments known in 1941

the drift angle is determined by reading the location of the pointer on the base's scale

the angle can be obtained

Turn and Bank Indicator, 4 Minute Turn, & Eyebrow Lamp Italian the dial on the rightThis is a Vietnam War era Turn and Bank Indicator NSN 6610 00 169 1489 made by Midland Ross as used in the Bell AH 1S Huey Cobra Attack Helicopter and the Bell UH 1 Huey Helicopter, according to its parts manual dated 1982. Included is the Eyebrow lamp bezel. The electrical connector has broken from the rear case of the indicator. Measures 3. 25 inches diameter and 6 inches deep. Functionality of the eyebrow lamp is unknown.