There are nine 10x7,5 cm and two 7,5x5cm PCBs

1. WAV1B
2. VC RADSR
3. RMP1B
4. VCF8E
5. EGLFO1A
6. VCA6B
7. VCA5B
8. LFO5A
9. 3544 - VCO

1. 4627 - VCF
2. 46212 - VCF

Allready found out, that they were made by EFM (ele4music) and designed by a guy named Tom Gamble.

Also found

http://www.modular.fonik.de/Page37.html

with tons of schematics, BOMs and layouts of those modules. Some things look a bit shady though, BOM has three pots, while the front panel has four, as an example.