I recently came into possession of a Furscht or Lurscht brand french horn. It is a compensating double horn with a detachable bell, stop valve and a 3b linkage system. I live in the United States (Colorado) and there is practically no information available to me on the maker or style of this instrument. It has been well cared for and is in fine working order. I would like to know if anyone has heard of this maker, its origin, and time period of production.