There is 1 Franz Xaver Kaiser bassoon in the Hichwa-Rachor database. He flourished in Zug (Switzerland) from a1823 to 1867. Little can be found of this maker; this bassoon is one of the few extant instruments.
Franz Xaver Kaiser Literature
Jansen, Will. The Bassoon: Its History, Construction, Makers, Players and Music. Frits. Knuf, 1978 Vol. 1, p. 410.
Myers, Arnold. Historic Musical Instruments in the Edinburgh University Collection, Vol. 2, Part E, Fascicle ii: Bassoons. p. 11.
Kälin, Walter. Die Blasinstrumente in der Schweiz. 2002.
Waterhouse, William. The New Langwill Index. London: Tony Bingham, 1993.
Kaiser, Franz Xaver, 8 key bassoon; Kaiser1-O-Edinburgh154
Kaiser1-O-Edinburgh154 General Information