what type of Potentiometer has 12 pins and is labeled 100kE?

It is two (or more) mechanically ganged pots in one package. That accounts for 6 pins, unless there are more than two pots. The others may be for mechanical support or they may be taps that are not used. The values you will have to get from the schematic.

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This may be a multi-section potentiometer. Each section is a potentiometer by itself and has three terminal pins. A device with four sections will have 12 pins. All sections share the same shaft for resistance control.

An example of two-section potentiomter is the volume control of stereo amplifier. The two sections control the volume of left and right channel of audio respectively.

In the schematic diagram, each section is a represented by a standard symbol for potentiometer. All sections are connected together with a dotted line indicating that they are synchronized in operation.

This is nothing but 100 k ohms Tailor made spl type potentiometer my be with centre tap with multiple grounding point(if metal frame is used for rigid support.