Autopilot Control Panel for A-5 Auto Pilot System, Sperry Carvair It appears that the lens

It appears that the lens can be removed and the upper and lower operating limit indicators can be set by sliding the triangular pointers along the scale (we have not attempted this in order to preserve the artifact)

The Receiver

Here is an article from Flight Magazine Sept 1943 describing the Astrograph

as used in US Navy aircraft during WWII

25 inches diameter and ~3

Autopilot Control Panel for A-5 Auto Pilot System, Sperry Carvair It appears that the lensThe A 5 Automatic Pilot was used primarily in WWII era bomber aircraft of the Air Corps US Army such as the Consolidated B 24 Liberator (see photo of B 24 cockpit showing the location of the A 5 panel). The A 5 system appeared in aircraft manufactured during or before 1943, the year when the Honeywell C 1 system became the standard autopilot system for large multi engine aircraft. Theoretically, the A 5 system may also have appeared in the Boeing B 17