This is an original (ORIGINAL!) Agilent product - acquired from Varian Vacuum. IT is a nude hot cathode ionization gauge (BA type gauge). Bakable to 400 deg C. Ready to measure UHV. This is a used item - one of the two filaments (the spare) is broken. But the remaining filament is still functional. And replacement components such as the filament are still commercially available.
Will ship with protective packaging. Full refund within 60 days.
Atmosphere side electrical connectors are commercially available, usually part of the ion gauge controller.