Turn and Bank Indicator US Navy, WWII 88-I-3280 WW2 The knob at the top

The knob at the top of the indicator is actually a hex key used to adjust deviations in readings on the Master Compass

azimuth and elevation of the identified target and allow the observer to take control if the “blip” was identified as unfriendly

25 inches diameter and ~ 2 inches deep

Note that this was once owned by a smoker

Turn and Bank Indicator US Navy, WWII 88-I-3280 WW2 The knob at the topThis Turn & Bank Indicator PN1719 1AF A1 made by Pioneer, was used across virtually all aircraft of the US Navy during WWII. It is in good condition given its age. The dial markings are clear and the glass, case, and fluid are intact. It has a service date stamped on its side of Feb 1945.