This one is pretty common cheaper ribbon mic designed for broadcast and consumer recording.
Some sellers on Ebay say that it is an EV version of famous RCA 44 mic, which is not true. The only thing resembles RCA is its outside shape. The internal structure is very different.
It was built around Alnico magnets and Armco iron pole pieces, with brass supporting frame.
There were 3 models--V1, V2, and V3, which had different cable connectors, impedance selectors (or lack of those), mute switch, and different internal structure support and shock absorbers. The V1 had a slightly lower HF response corner.
The impedance selector on V3 has 50, 250, 500, and 25K settings, where the last was intended for direct to grid operation.
I serviced quite a few of those and the transformer is not of the highest quality, usually with uneven lamination and black residue. The mic would greatly benefit if you replace it with Lundahl. Although you lose impedance switching, the response will be much more uniform and extended on HF.
If as you say, the ribbon rubs the magnets (pole pieces), it is a good time to re-ribbon it. The original ribbon was made of rolled material. Modern electroplated pure aluminum has much better compliance and you will get much better performance.
Overall, properly restored/updated this mic can be quite a capable performer.