A couple months ago, I found this ad for the Pianet N:
Apparently, it's from a Reader's Digest magazine from September 1969.
Here's my translation of the text:
With your Hohner Pianet N choose: dance, entertaining, jazz, classical
The pleasure grows with every note of this charming musical instrument. The space-saving form, the sound similar to a piano, and the adjustment to any volume - you will come to appreciate all of that if, for example, the easily transportable Pianet N should be moved to a different place. Or if you prefer silent playing, in order not to disturb anyone, use the headphone socket - and play as long and as often as you enjoy it.
