Turn and Bank Indicator, (Wendezeiger) Luftwaffe, Fl 22402, Pneumatic

This is a 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.  

Measures ~3 inches diameter and 5 inches deep.  The glass and face markings are intact, as is the floating ball within the bank indicator.