Compass (Busola) Magnetic Direct Reading, PZL Type 1
Here is a Direct Reading Magnetic Compass (Busola), Type 1, made by, or for, the Polish aircraft manufacturer PZL (Państwowe Zakłady Lotnicze).
The compass fluid is present and the compass card swings freely. Accuracy seems to be slightly off, but could probably be recalibrated with the compensator screws. Measures ~2.5 inches diameter and ~2 inches deep.