Pressure Gauge, 20PSI, PN 6400-C4B1-A5, Bureau of Aeronautics, US Navy
$9.50
Here is an aircraft Pressure Gauge, 0-20PSI, made by Bendix for an aircraft of the US Navy. It has an R88-I- Navy stock number from the 1950's. Measures 2.25in diameter and ~4in deep.