Fuel Quantity Indicator, B-47B Aft Main Tank, Minneapolis-Honeywell JG7021A23 (#2) DC-6 terrain as viewed through the

terrain as viewed through the drift sight should be traveling parallel with the direction of the aircraft if there are no crosswinds

but its pure speculation

This is an authentic Hand Signaling handbook of the Japanese Navy

The data labels on the back have been painted over

Fuel Quantity Indicator, B-47B Aft Main Tank, Minneapolis-Honeywell JG7021A23 (#2) DC-6 terrain as viewed through theHere is a Fuel Quantity Indicator as used in the US Air Force Boeing B 47B Stratojet Bomber for the 24,000 lb capacity Aft Main fuel tank. See photo from the B 47B Flight Manual showing the location of this instrument. It has date stamp of November 1950. It is in exceptional condition given its age. The dial markings are clear and the glass and case are intact.