Are the standard synth interfaces too boring for you? If yes, then take a look at the SynTesla, a DIY Synthesizer with a series of Tesla Vacuum tubes. The sound engine is based on a Waldorf Streichfett, a compact digital string machine Synthesizer.
The instrument stands out not for its extraordinary sound engine but mainly for its beautiful Steampunk inspired interface. It could be issued without problems at one of the next steampunk conventions. Beautiful work!
Found on the Pj Tardiveau YouTube Channel