Pressure Gauge, 50PSI, Type 24100-45H-21-A1
Here is an aircraft Pressure Gauge, 0-50PSI, Magnesyn Indicator made by Bendix for an aircraft of the US military. Measures 2.25in diameter and ~3in deep.
Other than the dial face and the part number, the gauge shipped may not be identical to that pictured. Please contact us if a photo will be of help.