This instrument is a bit of a mystery. The only clue is an image of Maccaferri playing a similar instrument in the early 1930’s in Paris. In the article:
Maccaferri describes a loudspeaker membrane connected to a 12 organ-type pipes. The loud speaker drum and general shape looks like a match. However, the open cutout near the fret board and hight of the fret board are clearly different.