Compass, Direction Indicator, Kollsman Type 488C-01-615 Poly-Plane Compensator ME-109 Here is an aircraft Fuel

Here is an aircraft Fuel Pressure Gauge

The Mk X regulator was for a high pressure continuous flow oxygen system and allowed the pilot to control the flow of oxygen centrally for up to 8 crewmen

MIL-I-7627A

fuselage tank (110 gals)

The center knob adjusts the indexing indicator for the view angle of the pilot

Compass, Direction Indicator, Kollsman Type 488C-01-615 Poly-Plane Compensator ME-109 Here is an aircraft FuelThis appears to be a 1930's era Compass and Directional Indicator, made by Kollsman. We've not seen one until this specimen was found, have failed to locate any documentation on it, and therefore can only share what we can physically examine. It is a large instrument, 5. 5 inches diameter by ~4. 25 inches tall and 4lbs in weight. It is comprised of a liquid filled compass, which indicates with the thin inner pointer, and a larger direction indicator