One OEM "New/other" vintage ELECTRO-VOICE 3 pin plug in the format of 4 pin plug AMPHENONL 91- MC4M These are getting super hard to find, especially unused ones! Has 3 pins, (position 1,3,4) but has 4 holes so you can move a pin to configure as needed as was often done on EV multi impedance mics to select the impedance output. Most had a 4 pinout but only use 3 of the 4 pins These have the Electro-Voice logo in the plastic in between the pins These were wired but never used, so there is a bit of wire still in each you will have to pull out as you heat up the pins. Apparently these came on OEM cords that with EV mics that the user did not need, for whatever reason, and had cut off the plug off the stock cable. Great for authentic EV mic displays. Fits old EV and Shure 4 pin mics. These have the key offset from pin 1 and fit most any old mics or radio jacks that use the ampheonol 4 pin format, except for some Motorola 2 way radios, which had the key in line with pin 1.