Engine Gage Unit for US Army Air Force & Navy Fighters, 1944, AN-5773-1 C-130 This one has a service

This one has a service label "NARF ALAMEDA" (Naval Air Repair Facility)

which would illuminate the inner rim of the dial when the knob is rotated

Therefore the instrument was likely made several years earlier

This is a dual Oil Pressure indicator as used to measure oil pressure in the left and right hand supercharger sumps in the US Air Force C-121 transport version of the Lockheed Constellation

This example has a serial number prefix of AF-44

Engine Gage Unit for US Army Air Force & Navy Fighters, 1944, AN-5773-1 C-130 This one has a serviceThe AN 5773 1 Engine Gage Unit was used across a variety of aircraft of the US Army Air Force and US Navy during and after WWII. In particular, the AN 5773 1 made by Electric Autolite (aka Motometer) part number 10322 A was used in fighters P 38L Lightning and P 63 A & C Kingcobra according to the US Army Air Force's Maintenance Interchangeability Cross Reference Chart TO 00 45 1 dated Feb 1945. This example has a serial number prefix of AF 44,