Fuel Pressure Gauge, 10PSI, PN 88G502, Bureau of Aeronautics US Navy

Here is an aircraft Fuel Pressure Gauge, 0-10PSI, manufacturer unknown, with BU AERO US NAVY embossed in very small letters on the center of its face.  Measures 2.25in diameter and ~2in deep.  The item shipped will vary slightly from the one illustrated here.