Clarinet. Nominal pitch: A.

Technical description: stained boxwood, brass keys, ivory ferrules. Shares barrel and mouthpiece with (4063). Five pieces. Mouthpiece, barrel, upper section for all fingers except R4, lower section with keys, bell. German style mouthpiece of ebonite grooved for cord; probably not original. Long slightly bi-conical barrel with two ivory ferrules. Upper and 'middle' section in one piece. Three key rings of rectangular section. ThroatA-ring recessed to fit the speaker touchpiece. Speaker liner projects almost to the middle of bore. Small metal tube in the tone-hole for L0 to prevent water from dripping out there. Side trill key for throatA-B♮ crosses side key for F₄/C₆. Spectacle with countersunk tone-holes which correspond with an intonation-key to replace the B♭₃/F♯₅ key. Mounted with pillars. Integral thumbrest. Lower section: levers for L4, tone-hole and key for R4 mounted in a fusiform swelling. Bell discontinuous; ivory ferrule on top, wooden integral rim. L0: T; speaker. L1: T; throatA♮; throatA♭. L2: T. L3: T; 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 with intonation-key. R3: T + spectacle correspondance to intonation-key; B♭₃/F♮₅. R4: F₃/C₅; G♯₃/E♭₅. Keymount type: spectacle, blocks, pillars, swelling. Leaf springs and needle springs. Keyhead type: shallow cups