Master Direction Indicator, Autopilot, Type N-5, US Air Force 1951
This is a Master Direction Indicator for the Bendix autopilot system, Type N-5, Bendix part number 16404-1C-A1, with a serial number prefix of AF-51, indicative of a manufacturing year of 1951 for an order by the US Air Force. We have yet to link it to a specific aircraft of the USAF.
This indicator has 3 calibration screws along each outside edge of the dial, as well as a calibration window on its top side.
It is in exceptional condition given its age. The dial markings are clear and the glass and case are intact. Measures ~3.25 inches diameter and ~10 inches deep, and is 4 lbs. See photos.