Wheel and Flap Position Indicator, R-88-I-1884-670 US Navy

This is a WWII-era Wheel and Flap Position Indicator, R-88-I-1884-670 as used in aircraft of the US Navy with tail wheel landing gear.  According to the US Navy Aeronautical Instruments Catalog Class 88, this indicator was used in the F6F-5 Grumman Hellcat Fighter.  

This indicator is in good condition for its age. The glass and case are intact, and the markings on the face are precise and unblemished. The white label indicates that it has been through Naval Air Station Norfolk VA.  Measures 3.25 inches diameter and ~3 inches deep.