Noone ?
Ok, that's an easy task:
So what you've got is a microphone made by the japanese company "Primo" - at least the capsule.
This capsule was used in many brands including Nakamichi (CP-4), Akai, Jvc, Unisound, Universum, etc. and should look like this:
As you can see, the "capsule" from your first picture is normally spot-welded to the head assembly. As can be seen in your third picture, the head-assembly got broken, therefore the "capsule" got off and caused the "rattling sound". Since the capsule is spot-welded to the head-assembly there is not only the red wire, the ground connection is made via the case.
On the small (epoxy-)pcb which can be seen in the second picture are a FET and 2 resistors. One 300M-resistor is connected to the gate of the FET, and a ~3,3k-resistor is between Source and Ground. From this small pcb 3 wires go to the outer pcb, red is the drain, green is source, blue is gnd.
The red wire is connected to the black wire which goes to the "+"-terminal of the battery. The "-"-terminal of the battery goes to the pcb which can be seen in the last picture, where on the invisible side a 680Ohm - 2,2kOhm resistor is mounted and connected between the "-"-terminal to ground. The blue 10µF capacitor is for DC-decoupling.
If you have a multimeter you can verify the values by measuring between the green and the blue wire on the head assembly (3,2k - 3,7k) and between the "-"-terminal and ground (680Ohm - 2,2kOhm).
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