We brought you advance news a few weeks ago of Synth Fest 2015, hosted by Bastl Instruments / Noise Kitchen in Brno, Czech Republic. and here's a video from it featuring a one-of-a-kind instrument from communist-era Czechoslovakia. The Elektron-83 was an early workstation-arranger keyboard.
Thanks to Peter Kirn at CDM for the video and the story.
More information:
Older Music Machines & the People Who Still Use Them