As it's opened waiting for some components to finish the cap job, i thought i might as well post some gut pics here in case it helps someone.
Polytone minibrute I from 86 apparently.
the layout and components seem to match exactly the schematics found on murchmusic website, except that the preamp only has the most basic features : no reverb or distortion.
Enjoy
EDIT: In these pics: some parts are missing as i am waiting for them to be delivered.
Power amp misses : 2 4000uF caps, 1 1uF non polarised cap.
Preamp had one cap and one resistor in serie between 2 traces (not visible on pic)