Technical description: Blackwood with german silver ferrules and keywork. Five pieces: mouthpiece, barrel, upper section, lower section, bell. Upper section: curved speaker, tone-hole on the front of the instrument, bowl-shaped chimney, speaker liner projects c 2mm into bore. Lower section: patent C-sharp; thumb rest with additional plate for the thumb. Bell continuous with a wide german silver rim.
L0: T; speaker.
L1: T; throat A♮.
L2: T; throat A♭.
L3: T; cross E♭₄/B♭₅.
L4: C♯₄/G♯₅; E₃/B♮₄; F♯₃/C♯₅.
R1: T; side F₄/C₆; side trill key for throat A-B♮ and B♭-C.
R2: T + spectacle.
R3: T + spectacle (forked B♭₃/F♮₅); cross B♭₃/F♮₅ .
R4: G♯₃/E♭₅; F₃/C₅.
Keymount type: pillars. Keyhead type: modern.
Repair History: Thumb rest removed and replaced in higher position.