Clarinet. Nominal pitch: B♭.

Technical description: Boxwood with horn ferrules and brass keywork. Six pieces: mouthpiece, barrel, upper section, middle section for the fingers of the right hand, lower section with keys, bell. Unnamed barrel possibly original. Turned guide lines in upper rings. Extendable L4 levers, tone-hole and key for R4 mounted in a fusiform swelling. Bevelled G♯₃/E♭₅. Integral wooden thumb rest. Integral wooden bell rim. C♯₄/G♯₅key might be added later: round flat cover, brass mount.Matches (5261) - apart from style of L4 sliders. Differs from (5258) and (5259). 6keys. L0: T; speaker. L1: T; throat A♮. L2: T. L3: T. L4: C♯₄/G♯₅; 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, saddle. Keyhead type: flat square. Repair History: The C♯₄/G♯₅key might have been added later.