DealerInstalledVacuumGauge?

Anybody know if this is a factory or dealer installed unit? It was installed with one screw under the steering column, appeared aftermarket halfass installation. I yanked it off when I removed the column, bending it. I am about to chunk or shoot it, unless its worth a half a billion dollars or someone wants it. Free plus shipping. It is totally not accurate since resting shows 4 inches vacuum.