Both pics are from French language sites. The first is from one of the several Early Wind Instruments sites (http://www.whc.net/rjones/antiques.html -- this mirror happens to have some English script -- and mis_dates the horn) and the second is from Clarinettes & Saxophones (http://perso.wanadoo.fr/helleringer/index.htm).


A. Sax produced the first saxophone in about 1843: a C bass in the shape of an ophicleide, as the original patent drawings show. Most of the original Sax baris were also cuved instruments, but that seems to have gone away by the time Sax was into full production. I'm gonna let SAXTEK take it from here:

"That baritone picture was originally published in Saxophone, Erfindung und Entwicklung einer Musikinstrumenten-Familie und ihre bedeutenden Hersteller (whew!) by Gunter Dullat. The book is not entirely accurate, but since Dullat actually owns the horn, I'm sure he has at least correctly identified the key in which it is pitched. It is the only baritone in F that I know of that still exists, made by 'PELISSON FRERES & Cie., SYSTEME GEORGE BREVETE S.G.D.G.' It was made around 1900, and even though it's not that old, I sure wish I could find one."