I'm not an expert, but...

I've seen the 'mouth-organ' invented by Wheatstone. It is a box blown from a central hole, with buttons on the sides, arranged like the English, about one octave.

Guest Jon, what Wheatstone invented was the fingering system, the arrangement of the instrument. As I understand it.
The small metal reeds came from China.

Dave Polshaw, my ex-Sally-Army Lachenal isn't black. It has been re-bellowed in black, but has brown-stained varnished ends. Still in the original case marked 'Salvationist Publishing & Supplies Ltd, Musical Instrument Department.' At least, I think the box and the box go together.