This supremely cool analog synth with a gorgeous etched-brass faceplace showed up on Steampunk Workshop, via the German synth site Synthesizer Database. The builder is Moritz Wolpert. Apparently, from the Google translation, all the knobs and handles were turned by hand on a lathe and the faceplace was hand-lettered, decorated and etched. The project took him two years.
Etched-brass modular synth