It's disputed as to whether these horns use an SX90 body or a Buffet S3 Prestige body.
My (Pete) *opinion* is that these are SX90s, with the exception of the low B/Bb key,
which is an obvious Buffet design.

There are a few videos on YouTube.
Bb Tenor Serial # ? (2014)
Bb Tenor Serial # ? (2014)
Copper body, lacquered brass keywork.
From DanY on SOTW.