Pilot Director Indicator as used with C-1 Autopilot, WWII B-29, B-24. B-17 PV-2 Harpoon so it was likely made

so it was likely made for a Navy version of the C-121 (R7V-1) or another US Navy aircraft

the narrower pointer which indicates airspeed in 10 km/h increments rests behind the thick pointer

and rather heavy

made by Pioneer div of Bendix

Pilot Director Indicator as used with C-1 Autopilot, WWII B-29, B-24. B-17 PV-2 Harpoon so it was likely madeThe 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