Engine Gage Unit for US Army Air Force & Navy Fighters, 1944, AN-5773-1 C-130 The knob situated below the

The knob situated below the display rotates to oil reservoir 1 thru 4 (see photo of display partially rotated)

Therefore the instrument was likely made several years earlier

Here is a Rocket Station Distribution Box which appeared in WW2-era F4U Corsairs and TBM Avengers of the US Navy

of the Velocom design

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

Engine Gage Unit for US Army Air Force & Navy Fighters, 1944, AN-5773-1 C-130 The knob situated below theThe 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,