Directional Gyro, Sperry US Navy Mark IA, AN-5735-1 P-39 An unusual feature is that

An unusual feature is that the minute hand of the stopwatch rotates counterclockwise as it counts the minutes

Here is a Direct Reading Magnetic Compass (Busola)

See the illustration of the JU-87 blind flying panel showing the location of this altimeter

containing magnets which compensate for deviation

Directional Gyro, Sperry US Navy Mark IA, AN-5735-1 P-39 An unusual feature is thatThe WWII era Directional Gyro Mark 1A was standard equipment in aircraft of the US Navy such as fighters F4F Wildcat, F4U Corsair, and F6F Hellcat. Made by Sperry, part number 646050 to AN 5735 1 spec. The face is embossed with the marking BUR AERO US NAVY (Bureau of Aeronautics). According to the spec sheet in the Index of Army Aeronautical equipment Volume 6 Instruments, dated 1944, "This unit is equipped with a vacuum driven gyroscope with its