Couldn't help but share this fascinating picture. It's a nice Kingma Brannen quarter tone flute, look at all those thumb keys! Reminds me a bit of the bassoon. Would you hafta be a Polydactyl flutist? Click on thumbnail pic for a bigger picture.
The revolutionary Kingma System Flute offers a complete quartertone scale and unique multiphonic venting designed by Eva Kingma and Bickford Brannen, founder.