Compass, Magnetic, US Military Vehicle, Pioneer 1829-2-A C-46 and "МАСЛО ОПАСНО" means Oil

and "МАСЛО ОПАСНО"  means Oil

The Special Devices Section grew and became the Special Devices Division

The battery ammeter indicates the current flow through the battery charging system

followed by discussions between Kearfott engineers and members of the USAF/RCAF LF Loran Flight Test Unit involved in polar flying out of Edmonton

Handwritten overhaul markings are on the back

Compass, Magnetic, US Military Vehicle, Pioneer 1829-2-A C-46 and "МАСЛО ОПАСНО" means OilThe Pioneer 1829 2 A Magnetic Compass was used in various US military vehicles and naval craft during WWII. It has a screw type heeling compensator, a removable drawer type compensator, a screw type horizontal compensator, and a spider type compensator, all for the elimination of errors caused by magnetism. Has a constant deviation corrector and a course setter. With a rotatable dial engraved with the compass card graduations. The compass mounted