Hallo Susanne,
das scheint ein interessantes Horn zu sein.Es ist ein sogen. "Patented Model". Das Bj dürfte so um 1922 oder später liegen liegen. Wenn dein Horn Perlmutt auf den Tastenhat dann eher später. Lies mal was Saxpics.com darüber schreibt..
* Patented models. Paul Evette and Ernest Schaeffer bought the Buffet-Crampon firm in 1885 and patented their first saxophone on July 25, 1887 (December 5, 1899 in the US). These horns are significantly different than earlier models and are possibly the most technically advanced of any French-made horn produced at the time, with the possible exception of Couesnon.
All horns had the following features:
Updated engraving featuring the Buffet-Crampon logo and the Evette & Schaeffer name. The importer's name, generally either "Carl Fischer, New York" or "HN White, Cleveland" (HN White, the manufacturer of the King saxophones, imported these horns as their saxophone line until approximately 1908) is only engraved on horns exported to other countries.
Double or "split" octave key. In approximately 1916 the automatic octave key became standardized (it was an "additional cost" option before this). Low B models probably never gained the automatic octave key.
Roller keys. Most low B models do not sport this feature.
Horns available in both low pitch, A=440hz and high pitch, A=457hz. See my comments regarding LP vs. HP instruments HERE.
Some horns are engraved "Conn" to avoid import taxes into the US. (Some Conns were engraved "Buffet" to avoid export taxes to France, so I guess it all works out
All models except the Low B horns introduced the following:
A keyed range that extends from low Bb to high F on alto, C melody and Bb tenor. Keyed range extends to low Bb to high Eb on soprano, baritone, bass and contrabass models.
A front altissimo F key is available on Eb altos and Bb tenors.
C horns (melody tenor and soprano models) in approximately 1920. These horns are very uncommon, as France never had the same fascination with C horns that the US did.
Contrabass models around 1920. These were only custom made and very few were produced -- it's theorized that somewhere between six and 20 sitill exist. (Take a look at my SOTW article regarding a performance that included one of the few surviving Evette & Schaeffer contras.)
Baritone models that no longer had a fixed neck.
Pearl keywork, in the mid 1920's. They don't appear to be "standard fare" until the 1930's.
Hier der genaue Link:
http://www.saxpics.com/buffet/evette-schaeffer.htm
Gruß Mario