Autopilot Flight Controller USAF E-4, C-130 F4U Corsair The scope itself appears to

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

This edition contains a misprint of pages 201-239 covering about 10 pages of the Scintilla chapter and most of the Friez test/recording instruments chapter

which appears to have deformed from heat or sunlight

and the lettering is perfect

hydraulics

Autopilot Flight Controller USAF E-4, C-130 F4U Corsair The scope itself appears toThis 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.