Gyro Horizon, Pneumatic, FL22427, Luftwaffe Wendehorizont PV-1 Ventura the cover is no longer

the cover is no longer attached to its staples

As the aircraft turned to the selected course

part number 1556-2K-A

and to what degree

A smaller inner window rotates and indicates hundreds of miles per hour

Gyro Horizon, Pneumatic, FL22427, Luftwaffe Wendehorizont PV-1 Ventura the cover is no longerHere is a WW2 era German pneumatically powered "Wendehorizont" Gyro Horizon FI. 22427, made by Askania (see "Hersteller: bxx", bxx was the code for Askania). This Wendehorizont was used in aircraft of the Luftwaffe such as twin engine night fighters Messerschmidt ME 110, 210, and 410, and bombers Junkers JU 88, Heinkel HE 111, and Heinkel HE177 Greif. The knurled rim around the glass lens can be rotated, which cages (Fest) or releases (Los) the gyro.