Elektor Formant Modular

is there anyone who knows what the machine in the picture is?
it sounds a little like a phaser and i think it was made out of 
elektuur (elector / elektor) magazines.
because nothing's written on the knobs a manual would be very handy.

+i've got the german formant book and empty pcb's (vcf 12 and 24db, 
noise,...) for trade
and am looking for the formant mixer, phase shifter, adsr controller, 
vc-lfo, lf-vco, dng,
but most of all the waveform processor. let me know off-list, if you 
have one of these and want to trade (or sell)

best, floris