Fuel Quantity Indicator, AN-F-48,-58 Fuels, US Army Air Force, KB-29P Aerial Refueling Wellington It has a date-stamp on

It has a date-stamp on the side of the case indicating a date of manufacture of 1940

Here is a fine example of Soviet WWII-era Type 1 Aircraft Clock

It displays total fuel on two different scales

Here is a Rapid Response

See photos of the diagram and descriptive text from the B-50 Flight Manual

Fuel Quantity Indicator, AN-F-48,-58 Fuels, US Army Air Force, KB-29P Aerial Refueling Wellington It has a date-stamp onHere is a very interesting dual fuel, Fuel Quantity Indicator, made by Minneapolis Honeywell part number G700C33 for the US Army Air Force order with a BAC prefix (Boeing Aircraft Corporation) for a Boeing KB 29P Aerial Refueling Aircraft. The KB 29P (116 of them) were created starting in 1948 from modified B 29 bombers, which pioneered the way for future designs of aerial refueling aircraft. The indicator is specifically part of the refueling system,