Compass, Direction Indicator, Kollsman Type 488C-01-615 Poly-Plane Compensator ME-109 The angled display shows the

The angled display shows the 'tulip'

Here is an aircraft Fuel Pressure Gauge

MIL-I-7627A

which is usually simple to do

Compass, Direction Indicator, Kollsman Type 488C-01-615 Poly-Plane Compensator ME-109 The angled display shows theThis 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