A Kuhlo horn is a kind of fluegelhorn, but is played with a trumpet mouthpiece.
  First third part of the tube is cylindric, thereafter konical. The instrument
  type was developed by pastor Johannes Kuhlo, who wanted an instrument with a
  sound well suited for the acoustics in churchrooms. He got what he wanted, nevertheless
  it seems strange that the instrments were tuned in b, when a tuning in c could have
  helped the cooperation with the church organ so much. Kuhlo tought his students
  to play with different fingerings, thus making the b tuned instrument sound in c.
  It worked well, but his music students might have had hard times when they joined
  another orchestra, a military orchestra as example.
  This instrument caries no maker's sign but has served well for some 70 years. It
  had 2 major overhauls trough time and though it was never really out of use it
  still plays.