I just found this on eBay. Very rare indeed.
The notes from miniorgan.com are as follows:
Hey, does anybody in the world know about this little freaky machine? This is the one and only calculator with a “Vibrato” switch. And look at the keyboardlike keys. With a shift key you can play the “halfnotes”. Has a built in sequencer – so this is maybe the smallest programmable keyboard of the world. Special Thanks to Alfakom from Denmark!