Autopilot Flight Controller USAF E-4, C-130 F4U Corsair and the lettering is perfect

and the lettering is perfect

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

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

just on the other side

Autopilot Flight Controller USAF E-4, C-130 F4U Corsair and the lettering is perfectThis 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.