This came with a bunch of T stuff we purchased. Have no idea what it is for. It says K-W Ignition inside. I am thinking it is some type of Master vibrator?
That's what it look like. Must have been made about 1914 as it has the new style points.
Master vibrators were common with early T's (and at least one Model N I know of) because you relied on one coil and points instead of having four to maintain (I believe that is how it worked). I think you screw down the points or otherwise disable the four, then wire the master vibrator into the system.
Ron Patterson gave wiring instructions and information about them in a thread early last year if I recall. Maybe he will see this and "refresh" my memory.
More, from a 1920 publication: