Technical description: Blackwood with german silver ferrules and keywork. Five pieces: mouthpiece, barrel, upper section, lower section, bell. Probably original ebonite mouthpiece with a ligature. Curved speaker with chimney on front of instrument. Long tailed throat A♭ indicates that the instrument was made for the British market. Barret action. R1 tone-hole through tenon of upper section. Plate for R2. Ring for R3. C sharp mechanism. All tenons and sockets lined with german silver. 13 keys, 3 rings, 1 plate, 4 ebonite rollers.
L0: T; speaker.
L1: T; throat A♮.
L2: T + ring; throat A♭.
L3: T + ring; cross E♭₄/B♭₅.
L4: C♯₄/G♯₅; E₃/B♮₄; F♯₃/C♯₅.
R1: T; Barret action (F₄/C₆; E♭₄/B♭₅); side trill 1-2.
R3: T + spectacle (forked B♭₃/F♮₅); cross B♭₃/F♮₅.
R4: G♯₃/E♭₅; F₃/C₅.
Keyhead type: modern.
Keymount type: screwed in pillars.
Playing accessories: reed, ligature, reed-cap.
Crack in lower section (at R1).
A matched pair with clarinet in B♭.