Technical description: Ebonite with german silver ferrules and keywork. Five pieces: mouthpiece, barrel, upper section, lower section, bell. Original named ebonite mouthpiece. Zig-zag speaker with chimney on front of the instrument. Long tailed throat A♭ key. C sharp mechanism. 12 keys, 2 rings.
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: screwed in pillars. Keyhead type: modern.
Inscribed on upper section "BOOSEY & CO LTD / MAKERS / LONDON / 28665 / L.P."; lower section "BOOSEY & CO LTD"; bell "BOOSEY & CO LTD / LONDON / G. H. 7".