In my efforts to a) turn my hand to as many instruments as I can/can afford and b) annoy my parents, I recently bought myself a 3rd, 4th, maybe even 5th hand fan driven chord organ!
The only info I can get on it is that it was made in Italy by a company called Giaccaglia, and it's an Ekatron Chord Organ.
The thing is rad.
It has a set of pipes for the keys, and a separate set of pipes for the chords/bass notes.
There's a volume control on it, that, when turned to 'Loud', makes the fan in the bottom whir up to a higher speed and give a little squeak of joy.
Hours of fun/noise to be had.