Turn and Bank Indicator, Pneumatic, RCAF Ref No 6AA/77, Type B
This is a WWII-era Turn and Bank Indicator, Type B, made for aircraft of the Royal Canadian Air Force, Ref No 6AA/77, made in Canada by Stanley Precision Instruments Ltd.
It is in exceptional condition given its age. The glass and case are intact, the level indicator contains fluid and the metal ball, and the lettering is clear and precise. Measures 3.25 inches diameter and ~5 inches deep.