[Alan Brinton]

Adam,

I think you are right about the mouthpiece being added later. It looks like it’s this Hohner, which I also have with my Pianos 36 and which fits them perfectly.

http://www.ebay.com/itm/Hohner-HMA-80-Mouthpiece-for-Hohner-HM36-Melodica-/400750903039?pt=LH_DefaultDomain_0&hash=item5d4e9d7eff

It’s interesting that the fit is so exact.