2 (small type) MOT coil, running without voltage multiplier. Primary tank cap 110nF, frequency 133kHz. Most parts are from my 4 MOT coil (rotary gap, 2MOT bank, capacitors).
Max spark lenght is 105cm. In this state it needs very big toploads.
I prefer this coil than the 4MOT one, because it's very compact, and it still gives nasty sparks.