Control Unit, BC-434-A, of SCR-269 Automatic Radio Compass, B-17, B-24, B-29 JU-88 made by Manning Maxwell and

made by Manning Maxwell and Moore

as used in the WW2-era US Navy's Consolidated PBY Catalina Patrol Bomber / Seaplane (see photo of PBY Instrument Panel from the Pilots Flight Manual with a yellow dot showing instrument location)

It is in very nice condition given its age

The data label indicates that it was made for Bureau of Aeronautics US Navy ("Bu Aero USNavy") and it has the stamped anchor symbol of the USN on its rear

Being partially a gyro instrument it has

Control Unit, BC-434-A, of SCR-269 Automatic Radio Compass, B-17, B-24, B-29 JU-88 made by Manning Maxwell andThis is a fine example of a BC 434 A Remote Control Box for the aircraft receiver BC 433 of the Radio Compass SCR 269 system for direction finding and homing. The receiver function tunes from 200 1750 kHz across 3 bands, which were selected by rotating the center knob below the frequency band window. The center knob rotates a flexible shaft connected to a rotatable loop antenna. The SCR 269 system (see diagram), as installed in an aircraft such as the