Pilot Director Indicator for C-1 Autopilot, WWII B-29, B-24, B-17 F-106 The C-12 Altimeter was used

The C-12 Altimeter was used across all aircraft of the Air Corps US Army

as is the banking indicator (fluid is intact)

These manuals are in good condition given their age

25in diameter and ~ 2

Pilot Director Indicator for C-1 Autopilot, WWII B-29, B-24, B-17 F-106 The C-12 Altimeter was usedThe Pilot Director Indicator (PDI) was used during WWII in bombers of the US Army Air Force , including heavy bombers B 17 Flying Fortress, B 24 Liberator, and B 29 Superfortress and medium bombers B 25 Mitchell and B 26 Marauder, and US Navy's PBY5A Catalina and PB4Y Privateer. The PDI was located on the pilots instrument panel, and received signals from the bombardier to indicate his desired course changes, left or right, to obtain an accurate bomb