Fuel Quantity Indicator, 5400 lbs, Minneapolis-Honeywell JG7020A13 P-51 The glass has a small

The glass has a small crack at  ~7pm on its face

but perhaps not surprising for an artifact of its age

and the AC-130A Hercules Gunship dated 1977

the numerical scale rotates clockwise or counter-clockwise while the pointer remains stationary

Crudely measured altitude from 0-25

Fuel Quantity Indicator, 5400 lbs, Minneapolis-Honeywell JG7020A13 P-51 The glass has a smallHere is a capacitance type Fuel Quantity Indicator displaying aircraft fuel quantity up to 5400 lbs. It has a date of manufacture stamped June 1952. It is in exceptional condition for its age, and was likely used on a US Air Force or US Navy aircraft during the 1950's.