Turn and Bank Indicator, (Wendezeiger) Luftwaffe, Fl 22402, Pneumatic Short Sunderland Activation can be set by

Activation can be set by time by using the timer adjacent to the key

made by Fenwal for the US Navy's Sub Hunter / Patrol Bomber Lockheed P-3 Orion

but it is either non-functional or requires the correct electrical input to function

The metal sheath would be screwed on from the outside to secure it in place

as confirmed in its parts list dated 1957

Turn and Bank Indicator, (Wendezeiger) Luftwaffe, Fl 22402, Pneumatic Short Sunderland Activation can be set byThis is an experienced yet fine example of an early WWII era German Wendezeiger (Turn and Bank) Fl 22402, as used in aircraft of the Luftwaffe, such as the Bf 109, Me 110, and Ju 87. This example has the pneumatic connection attached. Made by Askania, it has a manufacturing date of Feb 14, 1935. Measures ~3 inches diameter and 5 inches deep. The case paint shows some corrosion, but the glass and face markings are intact, as is the floating ball within