Fuel Quantity Indicator, 5400 lbs, Minneapolis-Honeywell JG7020A13 P-51 the numerical scale rotates clockwise

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

followed by discussions between Kearfott engineers and members of the USAF/RCAF LF Loran Flight Test Unit involved in polar flying out of Edmonton

See diagram of A4D-1 instrument panel from its flight manual dated 1962

and the AC-130A Hercules Gunship dated 1977

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

Fuel Quantity Indicator, 5400 lbs, Minneapolis-Honeywell JG7020A13 P-51 the numerical scale rotates clockwiseHere 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.