Currently it hangs on the wall some 2.5 meters to the right of this typewriter.
Variety is the spice of life.
I could counter that the minor third is very good indeed and the 7th and 11th harmonics are very well represented in 15-tone, but that just isn't the point. We have no intention of trying to play Schubert's Serenade or Home Sweet Home or Beethoven's Fur Elise on any 15-tone instrument. No, the point is having something for use now and then to contrast with 12 or 17 or 19 or 22 or whatever. Ten has been tried to a very limited extent. 10-tone is said to have been tried during the French Revolution when everything was going decimal.