Wheel and Flap Position Indicator, RCAF Ref 6A/827

This is a WWII-era Wheel and Flap Position Indicator, Stores Reference 6A/827 GE Type DJ4, as used in aircraft of Royal Canadian Air Force with tail wheel landing gear.  We have not yet identified the type of RCAF aircraft which may have used this indicator. We welcome any information from those who may know. 

This indicator is in very good condition for its age. The glass and case are intact, and the markings on the face are in place (yet changing color from the many years) and unblemished.  It has as service label dated 1953.  Measures 3.25 inches diameter and ~3 inches deep.