It's interesting that Thillmann does not show Klingenthal as a maker of US NCO swords. In fact, in his book on Army Swords he says "Neither French nor British made NCO or Musician's swords are known of or were discovered in the background research for this book." I don't know enough about European swords to know if other countries used a similar sword, and if this was made for a foreign country, or if it is indeed a scarce import for the Civil War. Except for the decorated quillion, it looks very much like an NCO sword. Hopefully someone with more knowledge of European swords will chime in. In the meantime, what is the blade length? Does the top scabbard mount have a frog hook?