Turn and Bank Indicator, (Wendezeiger) Luftwaffe, Fl 22402, Pneumatic Short Sunderland The metal sheath would be

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

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

NOTE:  the second pointer is missing

It is in good condition given its age

stamped Jan 1970

Turn and Bank Indicator, (Wendezeiger) Luftwaffe, Fl 22402, Pneumatic Short Sunderland The metal sheath would beThis 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