mystery harmonica

http://instagram.com/p/Sidzt6Idcn/

Does anyone know anything about this harmonica? Made by Hohner, “Sonny Boy” seems to only play 7 notes on the blow and another 7 on the draw, tuned like this:

|E|G|C|E|G|C|E|

|G|B|D|F|A|B|D|

Look like this one?

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Thinking they were made in the '50s, but that’s a guess.

Looks like a Tremolo Harmonica to me. You can probably find out more at www.harmonicaclub.com. There are several guys there that are into vintage harmonicas.