I can't identify this component - is it a capacitor?
In this case, the patent numbers are quite useful.
The first patent is on a liquid insulator/dielectric. That tends to point in the general direction of a capacitor, but not much more than that.
The second patent, however, is titled: &quot;Electrical Capacitor&quot;. That seems to point pretty strongly toward it being an...electrical capacitor.
The third patent provides reasonable confirmation. It's titled &quot;Paper suitable for capacitors, and process of making the same.&quot;
So, I'm going to go with &quot;capacitor&quot;. The first patent covers a liquid dielectric. Given that it doesn't look like the liquid has leaked out, it seems fairly reasonable to guess that it's probably still even reasonably close to its original rating.