Hello all, I'm here visiting from Clarinetpages.info (where I'm the Hero moderator guy). I've recently acquired a bassoon that may require an expert opinion. The seller advertised this as unbranded, but upon closer inspection I see the following on the bell joint: --NAA(?)-- MADE BY HECKEL BEIBRICH GERMANY My main concern here is the apparent misspelling of "Biebrich". Or is this an alternate spelling? In any case, do I have an authentic Heckel product? Pictures attached.