[Melodica-Me]

Hello Bill, there is a Hohner Cassotto 26 on ebay, take a look at the pictures where you can see how the air chambers are compare to the normal Hohner piano. I read somewhere that the way the chambers were divided is how it gives the superior sound over the Hohner piano, see how thick the body is in relation to the piano version as well.
Melodica-Me

http://www.ebay.com/itm/Vintage-Hohner-Melodica-Piano-26-With-Case-and-Mouthpiece-Made-In-Germany-/251518639486?pt=LH_DefaultDomain_0&hash=item3a8faddd7e