Clarinet with pièces de rechange. Nominal pitch: B♭/A.

Technical description: Boxwood with ivory ferrules and brass keywork. Ten pieces: 2mouthpieces, 2barrels (B♭/A), 2upper sections (B♭/A), 2middle sections for the fingers of the right hand (B♭/A), lower section with keys, bell. Original named ebony mouthpieces. Turned guide lines in upper rings. Levers for L4, tone-hole and key for R4 mounted in a fusiform swelling. Extendable L4 levers. Originally 5, now 6keys. L0: T; speaker. L1: T; throat A♮. L2: T. L3: T. C♯₄/G♯₅. L4: E₃/B♮₄; F♯₃/C♯₅. R1: T. R2: T. R3: T. R4: T; G♯₃/E♭₅. Keymount type: turned wooden rings, swelling. The B♭ uses a saddle for C♯₄/G♯₅; the A uses pillars and plates for C♯₄/G♯₅. Keyhead type: flat square. Repair History: The sixth key is C♯₄/G♯₅ and presumably a later addition.