Fuel Quantity Indicator, GE Type 8DJ20ABK, US Navy F4F
Here is a Fuel Quantity Indicator as used in a US Navy aircraft as evidenced by the yellow USN anchor symbol stamped on its side. We've been told that this was used in a version of the F4F Wildcat fighter, but although we've not confirmed via part number, its full capacity of the Main tank and of a single auxiliary tank match that of the F4F main fuel tank according to its flight manual. Measures 3.25in diameter and ~ 2.5in deep. The remnants of a service label from Naval Air Station San Diego are on the side.
It is in exceptional condition given its age. The dial markings are clear and the glass and case are intact.