Fuel Pressure Gauge, 50PSI, R88-I-1872, Bureau of Aeronautics US Navy P-3 Orion that is in a left

that is in a left turn the lubber line moves to the left round the dial

See photo of the location of the instrument on the Flight Engineers upper instrument panel from the C-121 flight manual dated 1958

and US Navy's PBY5A Catalina and PB4Y Privateer

the indicator appears as item 12 on the right side of the panel

The computing sight automatically calculates the deflection

Fuel Pressure Gauge, 50PSI, R88-I-1872, Bureau of Aeronautics US Navy P-3 Orion that is in a leftHere is an aircraft Fuel Pressure Gauge, 0 50PSI, made by Bendix, with BU AERO US NAVY on its data label. Measures 2. 25in diameter and ~3in deep. Appears to be New Old Stock.