Looking for info about this part

Hello guys.

COSSOR KA31814 Lc
c b a

I got this part from an old Midas console from the '70s. It was mounted on the input module, I thing on the eq section. I have schematics for a similar module, and the only coil or inductor in the whole diagram is for a selector of 3 frequencies on the mid eq. Unfortunately the schematic is a photocopy of a photocopy of a ... hardly readable. I would like to know the specifications for this part
 

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There no continuity between any of the 8 pins on one side. There are two windings with different impedance in the body (short grey wires on the side), soldered to pin1 (blue wire) and pin2, and pin2 and pin3 (other blue wire). Basically this unit was in the circuit with these 2 blue wires. That's why I doubt it's a transformer.
On the opposite of the pins, what may look like a jack input is just a threat and nut to fix the unit to any flat surface, in this case a PCB.