Clarinet. Nominal pitch: A.

Technical description: Cocus with german silver flush ferrules and keywork. Five pieces: mouthpiece, barrel, upper section, lower section, bell. Ebonite mouthpiece shared with clarinet inA (3866). Slightly bulbous barrel with metal tuning liner; all sockets metal-lined, all tenons lapped with thread. Upper section: Zig-zag rod and axle speaker. Chimney. Speaker liner projects c1mm into bore.Long-tailed A♭ with touch slightly stepped above the level of the shank to enable the player to use either the continental (R1) or English (R2) fingering. Lower section: shaped thumbrest. Patent Csharp. No metal rim to bell. L0: T; speaker. L1: T; throatA♮. L2: T; throatA♭. 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 throatA-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.