Beacon Radio Receiver BC-1206-C, Model 524 A-30 its use in the aircraft

its use in the aircraft evidenced by the dog-eared binder and some pages

The US Army Air Force Type D-12 Direct Reading Aperiodic Compass was used at the navigators station across many US WWII aircraft

which is available to download here

Sperry part number 644836

Beacon Radio Receiver BC-1206-C, Model 524 A-30 its use in the aircraftThe WWII era Beacon Receiver BC 1206 (with 3 manuals), often categorically called "Detrola", is a small airborne superheterodyne receiver with frequency range of 200 400 KC for receiving signals from ground based transmitters within a range of 150 miles. They could also receive voice transmissions, according to the documentation included in this listing. In the photo gallery, see the location of the receiver on the right side of the cockpit in a P 47