Up for sale are two vintage melodicas (called 'Melodions' in Suzuki-speak). Both were manufactured in Japan in the 1970s.
They are both model M-36. It's basically the the equivalent of the modern M-37, but with one less key.

Both Melodions are in good playing condition. One instrument has yellowed keys and some cracks around the mouthpiece inlet hole. These cracks do not inhibit playability and the instrument does not leak. Both carrying cases are in fairly shape for their age.
They have both been taken apart and completely cleaned, including the mouthpieces.

Both of these Melodions are tuned a bit sharp of concert pitch A=440Hz. Using the middle 'A' note, I have measured and marked the pitches of each (see the last photo). The one with white keys plays at about A=444, and the yellowed one at about A=442.
They are 50-year-old instruments, which, while being well-made, are still old, and may be better as solo instruments than trying to harmonize with others.

From a smoke-free home; no bad smells!

NOTE: I only ship to the 50 United States.  No international locales or P.O. Boxes. Sorry!