Autopilot Flight Controller USAF E-4, C-130 F4U Corsair The AAU 19A/A altimeter is

The AAU 19A/A altimeter is a standard 3 inch counter-drum-pointer altimeter which provides two modes of operation -- servoed (reset) mode and standby mode

hydraulics

The indicator is in very good condition for its age

It is very similar to I-65 compass indicators used in aircraft of the Air Corps US Army during WW2 (the primary difference in appearance being the centerpoint of direction

The scope itself appears to be in better than expected shape for an instrument of its kind

Autopilot Flight Controller USAF E-4, C-130 F4U Corsair The AAU 19A/A altimeter isThis is an example of the Flight Controller, Type A 6, for the USAF Autopilot Type E 4 (aka as the Sperry A 12 Gyrosyn Automatic Pilot System). The E 4 System was used in the late 1940 1950's and was still in use in some 1960's aircraft. Early Lockheed C 130 Hercules transports used this system, as well as civilian aircraft such as DC 3 and DC 6. This item has a serial number prefix of AF 52, evidence of manufacturing year of 1952 for a USAF order.